2003 Honda Accord - Overview

The all-new seventh-generation 2003 Honda Accord moves the Accord lineup to a new level of world-class style, sophistication and performance. Both the Sedan and Coupe have been redesigned and re-engineered to top the midsize class in engine performance, ride and handling, comfort and convenience features, safety, quality and refinement.

The rapid growth in the popularity of SUVs and "crossover" vehicles has expanded consumer choice and increased competition for the already highly competitive midsize buyer. As a result, the Accord development team targeted not only its traditional competitors, but also the finest European sedans in terms of design, engineering and "emotion" in an effort to move the Accord lineup to a higher level. The result is the finest selection of Accords ever made, setting new marks in key targeted areas while maintaining the durability, quality and reliability (DQR) and value that made the Accord one of the best-selling cars of the '90s.

What's New

• New exterior and interior styling
• New 160-horsepower 4-cylinder (+7%)
• New 240-horsepower V6 engine (+20%)
• New 5-speed manual transmission
• New 5-speed automatic transmissions (replaces 4-speed automatic)
• New 6-speed manual transmission available on the Coupe EX V6
• The latest safety technology, including now standard ABS
• Side airbags available on LX 4-cylinder models, standard on EX and V6 models
• Side curtain airbag system available on the EX V6 Sedan
• Re-engineered four-wheel double wishbone suspension
• Reduced noise, vibration and harshness characteristics
• Available next-generation Honda Satellite-Linked Navigation System
• Improved fuel economy and lower emissions
• New second generation Traction Control System (TCS) integrated with Electronic Throttle Control (ETC) for V6 models

Model Availability

Accord Sedan
As in previous years, the Accord Sedan is available in DX, LX and EX trim levels. The well-equipped DX Sedan is powered by a new 160-horsepower, 2.4-liter,

i-VTEC 4-cylinder engine and is available with either the new 5-speed or 5-speed automatic transmissions. LX and EX models are available with either the 4-cylinder engine or the new 240-hp V6. All LX and EX models are available with the 5-speed automatic transmission, while 4-cylinder models also offer the 5-speed manual.

At the top of the model range is the Accord EX V6 Sedan with leather interior. For the first time in an Accord model, a navigational system is available in EX sedans, the next-generation, voice activated Honda Satellite-Linked DVD Navigation System.

Accord Coupe
Accord Coupe buyers can choose between LX and EX trim levels and both are available with a choice of either the 4-cylinder or V6 engine. The 5-speed manual transmission is standard on 4-cylinder Coupes, with the new 5-speed automatic available. The LX Coupe V6 comes with a 5-speed automatic. The EX Coupe V6 is available with a 5 speed automatic or 6 speed manual transmission.

Body Design
Honda stylists used a fast jungle cat, the cheetah, as an influence when starting on the new Accords. Even at rest, it appears to be ready to move. The animal runs low to the ground, and has powerful leg muscles to propel it forward. These are classic cues used in the development of high-profile sports-car bodies but they are rarely used in the midsize segment.

Body Construction
The Accord's all-new unibody design is 27 percent stiffer in torsional rigidity while maintaining the same excellent bending rigidity of the previous generation. Extensive use of high-tensile steel and advanced engineering and manufacturing processes have also contributed to the Accord body's increased strength and stiffness. This helps to improve Accord's safety, performance and handling.

A new front subframe uses hydro-formed steel components. This system attaches to the body with special rubber "floating" mounts that reduce noise and vibration from the engine and front suspension. It's also designed to slide under the passenger compartment to deflect and better disperse crash forces in the event of frontal impact.

Engineers aimed putting the Accord at the top of the class in safety. Using supercomputers to model how collision forces are distributed throughout the Accord's unibody design, and Honda's state-of- the-art real-world crash test facility, the Accord meet its safety targets in internal testing, pending final testing by NHTSA.

Powertrains
As in previous years, Accord Sedan buyers can choose between an inline-4 and a V6 engine. Both are new for 2003 and feature a number of unique technologies.

The 160-hp, 2.4-liter 4-cylinder features all-aluminum construction, twin balance shafts, chain-driven dual-overhead camshafts and i-VTEC (Variable Valve Timing and Lift Electronic Control (VTEC) with Variable Timing Control, (VTC), which provides continuous phase adjustment for the intake camshaft. This new i-VTEC provides a wider powerband and improved drivability, along with higher fuel mileage and lower emissions. Balance shafts have been incorporated to limit noise and vibration. In California the 4-cylinder engine used for the LX and EX automatic transmission sedans will meet SULEV emissions regulations, the most stringent in the world.

The new 3.0-liter V6, which also features all-aluminum construction, increases output by 40 horsepower-some 20 percent-for the 2003 model year. This power output positions it at the top of the midsize class.

The newfound power comes primarily from five areas: 1) improved induction system and intake manifold; 2) a 3-rocker VTEC system; 3) increased compression ratio and the addition of a knock sensor; 4) larger intake valves; and 5) high flow exhaust system technology. An advanced engine mounting hardware in the new Accord features a unified "hybrid" design that integrates elements from the previous 4-cylinder and V6 systems. The new V6 Accord also meets ULEV standards for California specification vehicles.

Chassis
The 2003 Accords also have a new dynamic character. Engineers modified the double-wishbone suspension to improve ride and handling-in particular to reduce fore-aft body motions under acceleration and deceleration and to provide flatter cornering.

Engineers have tuned the 2003 Accord's chassis for a sportier, more European feel. In keeping with this effort, both the Sedan and Coupe are now fitted with larger, more performance-oriented tires that enhance ride and handling characteristics. The power rack-and-pinion steering also features new technology to provide more stability and reduced kickback.

Braking has likewise been significantly enhanced. Anti-lock Braking Systems (ABS) are now standard equipment on all Accord models. The 4-cylinder EX models and V6-powered models also add EBD (electronic brake distribution) as standard equipment for the first time. These components enhance chassis stability under braking and help trim braking distances in real world conditions. Engineers also enhanced Accord brake pedal feel and stroke.

Interior
The interiors of the new Accords blend driver-oriented features with information-oriented technologies. The higher beltline, along with a more prominent dashboard, provide a feeling of substance and solidity to the interior.

LEDs provide instrument illumination. When the car is at rest the instruments present a black appearance. The instruments light up in stages as the driver enters the car, inserts the key and starts the engine, revealing new large, bold meters. Dramatically improved driver and passenger seats and a more sport oriented driving position reflect the renewed effort that has gone into making the Accord the fun-to-drive standout in its class-whether you're going around the corner or cross-country.

Audio and climate control systems have also been significantly upgraded. EX 4-cylinder models with leather and all EX V6 models provide separate temperature controls for the driver and front passenger. Controls for the audio system, climate control and even the available next-generation Honda Satellite-Linked Navigation System (NAVI) are consolidated into a single, easy-to-use display. The new NAVI system features voice activation for navigational tools, as well as audio and climate controls. The controls set new standards in terms of speed, ease of use, and amount of available information.

A host of new safety features can be found in the Accord's interior. In addition to dual-stage front SRS airbags, side airbags are now available on the LX 4-cylinder models and standard on all EX and V6 models. As with all Honda and Acura vehicles, the front passenger's side airbag is controlled by an innovative sensing system that disables the airbag if the passenger is in its deployment path. Accord EX V6 models also come standard with a side curtain airbag system covering both the front and rear side windows in the event of a side impact. This system leads the industry in terms of speed of deployment, inflated coverage area, and maximizing inflated bag thickness while minimizing internal pressure.

Competitors
The 2003 Accord Sedan has two primary competitors in the mid-size market segment. The first, the Toyota Camry, is a sales-volume competitor. In recent years Camry has been Accord's chief rival for the honor of America's best-selling car. The Camry-based Solara coupe is virtually the only competitor for the Accord Coupes.

Accord's other competitor, the Volkswagen Passat, with its distinctly European driving character, is more of a "lifestyle" competitor than a sales-volume competitor. It sold 95,028 units in 2001, about 23 percent of the Accord's total. The Passat has also been successful at attracting younger buyers. Other competitors include the Nissan Altima, the Ford Taurus, and Mazda 6.

2003 Honda Accord - Body

When designers and stylists went to work on 2003 Accords they were looking to produce a more dynamic overall package, one with a more muscular and agile look. They chose a cheetah as their design theme, with a sleek overall body, aggressive front and muscular flanks. Their goal was to make the help make the Accord more of an emotional choice of buyers with more dramatic and aggressive styling.

Accord Sedan Styling

The aggressive front styling of the Sedan features faceted corners and geometric headlamps. The front and rear fenders and sculpted body sides use a unique combination of straight lines and organic curves to provide a blend of muscularity and vitality This complex combination of concave and convex angles and shapes presented unique challenges for production engineers to overcome, but was deemed important to help distinguish the Accord from its competitors. The three-dimensional and nearly flush side window glass adds a sophisticated sense to the styling and helps reduce wind noise.

From the rear, the new Accord Sedan features a short deck lid, generous glass area and artfully crafted taillights, whose wrap-around style honors previous Accord designs. The bottom of the rear bumper has been lowered 25mm to better conceal underbody chassis components.

The overall length of the 2003 Accord Sedan (189.5 inches) is only a tenth of an inch longer than the '02 model, but the wheelbase (107.9 inches) has been increased by an inch, reducing rear overhang and adding to the aggressive, muscular look. The Sedan is also 1.2 inches wider (71.5 inches). Body torsional stiffness also has been greatly increased. This in turns helps provide tauter suspension tuning, enhancing ride and handling and driver confidence, enjoyment and control.

Point of Pride

"Notice the complexity of this sheetmetal stamping. The way it transitions from a concave to a convex curve. It took an incredible amount of work to get that right, to engineer the stamping dies that produce that part perfectly. I don't know of any other company that would attempt it." -- Charlie Baker, executive chief engineer for the 2003 Accord.

As Executive Engineer (or "Large Project Leader" in Honda-speak) for the 2003 Accord, Charlie Baker knows this car better than anyone else. For the past two years he and his family have been living in Japan while he headed up a group of designers and engineers he calls the Dream Team. One of their goals was to add more "emotion" to the Accord.

"The Accord has traditionally been thought of as the "intelligent" choice," Baker says. "In the new car, I think we've successfully added a new, very emotional aspect to the Accord."

The development of the new Accord has been both exhausting and exhilarating for Baker. It also is the realization of a dream. Working as a powertrain engineer at Saturn in the mid-'80's, he studied Honda engine technology as part of his research. What he saw impressed him.

"I began studying Honda intensely in 1985 and I was fascinated by their whole approach to engines," says Baker in a 1996 interview in Wards Auto World. "I became the Honda proponent at Saturn." He wrote a letter to the President of Honda of America Mfg. Inc. (HAM), Shoichiro Irimajiri in 1987, and the two met soon after.

"It was a mind-blowing conversation for me," Baker says. "He poured out Honda's whole philosophy." Three years later, after a call from a headhunter, Honda hired him. "I think I clinched the job when I came into the interview carrying a notebook with every speech Mr. Irimajiri had ever given, and the notes from my first meeting with "Iri."

Since then, Baker has worked on the Civic Coupe, and was Large Project Leader on the original Acura CL Coupe and on the Acura MDX. He was also responsible for the early phases of the Honda Pilot project, before taking the reins of the seventh generation Accord.

Accord Coupe Styling

The first step for the Accord Coupe designers setting out to develop the "Ultimate Sport Accord" was to make a bold styling statement, further differentiating it from the Sedan. Rakish, youthful and energetic, and bearing a family resemblance to the S2000, the Accord Coupe shares some of the Sedan's styling cues, but none of its sheet metal. Everything is unique. A high beltline, sweeping door lines and rear fenders intensify the sedans theme of muscularity and vitality and convey a sensation of speed.

The exterior dimensions of the 2003 Accord Coupe are nearly identical to the model it replaces (wheelbase is the same at 105.1 inches, length at 187.6 is +0.8, and width is up an inch to 71.3). Extra attention to aerodynamics results in lower 0.29 drag coefficient, making it among the most slippery 5-passenger coupes available.

Unibody Overview

Like most mass-produced cars, the 2003 Accord uses a unibody design that combines the principal body panels and platform as one welded-up assembly. The benefits of this "body frame" concept are many, and it is ideally suited for passenger car applications.

Principal unibody benefits include:

• Light weight for excellent performance, responsive handling, high fuel efficiency and low emissions
• Excellent safety due to distribution of collision forces
• Incredible stiffness and rigidity for improved handling
• Excellent space utilization for maximum interior roominess
• Reduced use of natural resources for greater environmental responsibility

Body Rigidity

The 2003 Honda Accord unibody is 27 percent stiffer in torsional rigidity than the '02 model while maintaining the same excellent bending rigidity of the previous generation. Torsional rigidity is defined as the ability of the body to withstand twisting forces, such as when it travels over uneven surfaces or under hard cornering.

Bending rigidity is defined as the ability to withstand bending forces such as a choppy or undulating section of roadway. Using new dynamic body rigidity measuring techniques, specific areas of the body were targeted for further strengthening to eliminate localized vibrations.

These advances are important for a variety of reasons. First, a stiff unibody makes for a quieter car. Because the new Accord unibody flexes less, it has less tendency to produce drumming noises as it moves down the highway, encounters bumps or rounds curves. A stiff body structure also allows engineers to closely tune the suspension to provide optimal ride and handling qualities.

Honda carefully benchmarked the competition - the best of the midsize segment and even more expensive passenger-car segments - when engineering the 2003 Accord. For chassis rigidity engineers benchmarked the BMW 3-Series, the Audi A4 and A6, and even the Mercedes-Benz S Class. In torsional rigidity, the new Accord tops them all, and is second only to the Mercedes-Benz S Class in bending rigidity.

Doors and Door Sashes

The new Accord's doors and door sash structure - the formed metal structure around the door glass - played an important role in the development of the new body. Engineers wanted to reduce weight, improve appearance and improve stiffness, and developed a new hybrid manufacturing process to help accomplish their goals.

Honda engineers used multi-laser blanking combined with a roll formed outer sash to create the doors in the new Accord. This process uses steel sheets of a variety of thickness that are first laser-welded together to form a single sheet of material, which is then stamped to create the finished part. A roll formed outer sash is then attached to create a unique hybrid construction door (patent pending). With the metal thickness varied throughout the part depending on the loads it needs to carry, the door structure has all the strength it needs-without carrying excess weight. The result is not only a precise door in terms of dimensional quality, but also an incredibly rigid door and sash structure-25-percent more rigid than in the 2002 Accord-as well as some five percent lighter.

Safety Overview

An all-out engineering effort was made to ensure that the new Accord would rank at the top of the midsize class in the safety crash tests conducted by the U.S. government's National Highway Traffic Safety Administration (NHTSA) and the private Insurance Institute for Highway Safety (IIHS). These tests include frontal (both NCAP and certification tests), IIHS offset frontal, side impact (NCAP and certification) and rear end impact. Among the most rigorous is the IIHS 40 mph offset frontal, where the entire impact energy is focused on the left-front corner of the vehicle. The new Accord is targeted to achieve a "Good" rating, the best rating possible. In the challenging 35 mph NCAP frontal collision, a "Five Star" rating is expected. In side-impact tests, the new Accords are expected to earn a NCAP "Five Star" rating for front and rear occupants when equipped with front-side airbags (side airbags not available on DX sedan, optional on 4-cylinder LX models, standard on all other models). The Accord is joining an exclusive group of cars, such as the Volvo S60 and Lexus IS300 that achieve this very high level of performance. Even when not equipped with side airbags, the Accord is expected to earn a "Four Star" side impact rating.

See the "Interior" Tab for detailed information on the Accord's active safety features.

To make the unibody both stronger and lighter, 48-percent of the 2003 Accord's structure uses "high strength" steel. This material, along with carefully designed load paths within the body structure, helps maintain the integrity of the passenger compartment during a collision.

Front Subframe

In a severe frontal collision, the Accord's new steel subframe (that carries the engine/transmission unit and lower front suspension arms) can move rearward in a controlled manner (an additional 100mm more than the 2002 Accord) to further absorb energy.

Repair Costs

As Honda developed the new Accord Sedan and Coupe it benchmarked midsize competitors like the Toyota Camry, Nissan Altima, Volkswagen Passat and others, not only for passenger crash safety, but also for repair costs associated with low-speed collisions.

One of the most vexing things for a car owner is to have a minor fender-bender and find the repairs cost thousands of dollars. Like all Hondas, the new Accord is engineered to pass the Federal Government pendulum bumper tests at 5 mph, not the 2.5 mph required by the regulation. In addition, based on IIHS test standards, the new Accord is expected to have the lowest repair costs from low-speed impacts of any car in the midsize class. These tests include both flat and angled 5 mph front barrier tests, as well as flat barrier and pole 5 mph rear impact tests.

Aerodynamics Overview

Appearances have an engineering purpose too, in pursuit of the Accord Sedan's 0.30 Cd aerodynamic rating. That's an impressive step forward relative to the previous Sedan's Cd of 0.33. The Accord Coupe has seen similar gains in aerodynamic efficiency, going from 0.32 to a remarkable 0.29. In both body styles, the new shape provides superior stability and even reduces the collection of dirt on portions of the body. And by reducing wind turbulence outside the car, there is less noise inside the car.

There are several examples of how managing airflow helps give the new Accords the lowest wind noise levels of any Honda passenger car ever built. Windshield wipers have been recessed, the wiper arms reshaped and the side mirrors redesigned. Other measures contributing to reduce wind noise levels include dramatically reducing the width of body seams, fairing the A-pillars into the front fenders, mounting glass flush with the surrounding body panels, and using double seals around all doors.

A Pillar Design

The new Accord dramatically smoothes the airflow from the windshield to the side glass by using a three-dimensional side glass shape and a redesigned A-pillar. The result is a reduction in the "peeling vortex" created by the air moving from the windshield to the side glass, which both lowers mid- and high-frequency wind noise and helps improve side glass visibility in rainy conditions.

Side Mirror Design

Honda engineers also studied the airflow through the channel between the mirror and the A-pillar to refine the Accord's side mirrors. By changing the design of the channel to an expanding V-shaped passage, the passing airstream actually decelerates as it moves across the glass. In addition, looking from the side, you can see the mirror has actually been redesigned with more of an airfoil shape. These improvements to the mirror especially help reduce high-frequency wind noise. (See next page for illustration.)

NVH Overview

Front and rear subframes

To maximize gains derived from its stronger body, both the front and rear subframes of the new Accord have structural enhancements that improve ride and handling characteristics, while reducing noise and vibration.

The front subframe is a completely new design with hydroformed elements that substantially increase both strength and rigidity. Hydro-forming is the state-of-the-art method of creating complex shapes from high-strength steel. To make Accord's major subframe components, hydraulic water pressure forces the steel into rigid dies (molds) under tremendous pressure. The result is a precisely made part that is stronger where necessary and precisely the right size and shape. The subframe is attached to the Accord's body using special rubber floating mounts that minimize the amount of both road and engine noise and vibration transferred to the passenger compartment. Like the '02 Accord, the rear subframe of the new Accord uses rubber floating mounts for V6 models, reducing road noise.

Engine Mount System

The Accord has a new hybrid engine mount system, used with both the 4-cylinder and V6 engines. The system combines the strengths of an inertia axis system with those of a center of gravity engine mount system to achieve both excellent NVH and ride and handling.

The system starts by supporting the engine on two large mounts placed below the center of gravity of the powertrain. Combined with the subframe mounts, the engine mounts provide a "double isolation," or double rubber isolating elements between the engine and the passenger compartment, for excellent engine noise attenuation. The front most of these two center of gravity mounts is hydraulic and electronically controlled (except on the 4-cylinder with manual transmission which uses a hydraulic mount). Its hydraulic characteristics switch between two settings - one to optimize vibration performance at idle and one to optimize powertrain damping performance at higher speeds and over rough roads. The rearmost mount is a hydraulic mount for damping of the powertrain over rough roads. A dual mode engine side hydraulic mount is placed high on the engine connecting to the frame rail to best control powertrain motion during handling maneuvers.

An upper transmission mount is added high on the transmission connecting to the frame rail, again to control powertrain motion during handling maneuvers, and serves to provide symmetry in motion control. Finally, two rubber lower transmission mounts complete the setup.

The end result is a system providing excellent noise and vibration attenuation, superior powertrain damping over rough roads, and positive powertrain lateral motion control for excellent handling response. In addition, the mount system was engineered to compliment the subframe "sliding mode" during a front collision event, effectively increasing available crush by 100 mm.

See the "Chassis" Tab for more information on the Accord's suspension revisions.

NVH Insulating Materials

The selection of insulating materials plays a critical part in eliminating interior noise. But the use of thick, heavy insulators can reduce interior space and add weight to a vehicle, reducing performance, handling and fuel economy. For the 2003 Accord, engineers adopted a number of creative solutions, each one custom-designed for a particular area of the car.

Sound reduction strategies:

• Acoustic roof lining between the headliner and the roof sheetmetal is made up of layered materials including fiberglass, an adhesive layer and urethane
• Double door seals reduce intrusion of wind and road noise
• Lightweight melt-sheets used throughout the floor areas and inside the trunk
• Acoustic front fender bulkhead reduces sound made by water, front suspension, tires and road noise
• Formed urethane floor insulator in conjunction with mass-back carpet reduces road noise, vibration and harshness
• Urethane rear-wheel-housing insulator reduces road and water noise
• Hood insulator quiets engine noise

Sophisticated Craftsmanship

Moving the benchmark forward in the midsize segment requires a new level of craftsmanship. Though the Accord already enjoys one of the finest quality reputations and highest residual values (trade-in value) in the segment, the 2003 Sedan and Coupe "up the ante" with further improvements to quality.

Key points:

• Gaps have been reduced between doors and body panels (5.0 =>3.5 mm for the front door to fender, 5.5 => 4.0 mm for front to rear door, and 4.0 => 3.5 mm for the rear door to rear fender)
• "Zero gaps" between bumpers and fender panels
• A near flush center pillar (B-pillar) reduces noise through extraordinary component and assembly tolerances

Door Handles & Latches

Honda engineers studied the door opening and closing feel and sound of top European sedans while working on the new Accord's door pulls and latches. The result is a vehicle that feels like a vastly more expensive European car when you grasp the door pull and open or close the door.

The door pulls on the Sedan are large and suitable for a wide range of hand sizes, even with gloves on in winter. Pulling the handle releases the door with a smooth and quality feeling. The door opens quietly and smoothly. Closing the door produces a soft, quiet and refined quality sound.

Part of the credit for this extraordinary feel goes to the new door sash structures. The stiffer structure better resists the high-frequency vibration that often accompanies door closing, thereby reducing noise. There is also a new door lock mechanism, which drastically reduces lock operation noise. A new door "checker" (or door stop) and a new low-friction center hinge also improve the door function. The result is a firm, smooth, high-quality operation.

Moonroof

Thin and almost invisible, the Accord's available glass moonroof features a new molding that is bonded to the glass. This allows for a virtually flush fit with the surrounding roof, improving appearance and reducing wind noise. The trim around the interior opening has been eliminated for a cleaner appearance. The Coupes sunroof opening has been increased from 246 to 270mm. The Sedan was increased from 328 to 331mm. The motor and drive mechanism is quieter too. Air passes across an open moonroof can create an unpleasant situation called "wind throb" in the car's cabin. A specially designed pop-up deflector in the new Accord moonroof controls wind-flow and results in a 10 dB reduction in "wind throb" noise in city driving at typical speeds.

Multiplex Wiring System

As vehicles gain more and more electronic functions, engineers look for ways to manage the many signals that are required to operate them. Between the keyless entry system, security alarm (on Accord EX), auto-off headlights, TCS (traction control system), optional Navigation system and other features, there are dozens of functions on the new Accords that need to be managed.

In a multiplex system, one wire can carry many commands simultaneously, reducing the size, weight and complexity of wiring harnesses. A uniquely "coded" signal is sent through the wire for each desired function. For instance, a single wire might carry operating commands for all four of the Sedan's power windows and door locks. Each of these functions would be coded separately so that only the desired one would occur when a certain button was pressed-despite the fact that every device on the circuit received the same message.

Multiplexing Theory

Imagine a speaker addressing a room full of people, all of whom have different names. Addressing the entire room, the speaker asks Mike to stand up. Everyone heard the same command, but only Mike obeyed because only his identity "matched" that of the command.

The multiplex wiring system in the 2003 Accord Sedan and Coupe actually consists of two networks and significantly streamlines electrical operations by reducing the size and number of wiring harnesses, lowering vehicle weight, reducing component costs, and improving durability and reliability. The Body Control LAN, or B-CAN uses a communication protocol transmitting data at 33.33 Kbps and is used to control body functions including power windows, relay modules, a "Multiple Integrated Control Unit" or MICU, and turn signal assembly switch. The System control LAN, or F-CAN (Fast-CAN) uses a communication protocol of 500 Kbps and is used to control the engine and transmission ECU including functions like Electronic Throttle Control (ETC) for the V6 engine. These systems use the instrument cluster as a connection point or "gateway". The Accord's multiplex system is designed to be the most technologically sophisticated as well as the lightest and most cost efficient in the midsize category.

Material Technologies

Inside and outside, the 2003 Accord Sedan and Coupe represent a focused effort on Honda's part to reduce vehicle mass, while using high-quality and environmentally friendly materials. The results include better performance, reduced use of natural resources, improved fuel economy and lower emissions. With these gains Honda aimed for the Accord to be best in class on all environmental levels.

Materials such as lead and polyvinyl chloride (PVC) have been dramatically reduced in the new Accord, replaced by thermoplastic resin components such as those used in the fuel tank (non-SULEV variations). Lowering the presence of these materials in the vehicle helps the environment and improves the recyclability of the vehicle's key components at the end of their useful service life.

Trunk Lid Design

The 2003 Accord Coupe has a keyless trunk lock, which allows the trunk to be opened either with the key remote or interior release. The keyless trunk lid improves both security and styling.

Safety Overview

An all-out engineering effort was made to ensure that the new Accord would rank at the top of the midsize class in the safety crash tests conducted by the U.S. government's National Highway Traffic Safety Administration (NHTSA) and the private Insurance Institute for Highway Safety (IIHS). These tests include frontal (both NCAP and certification tests), IIHS offset frontal, side impact (NCAP and certification) and rear end impact. Among the most rigorous is the IIHS 40 mph offset frontal, where the entire impact energy is focused on the left-front corner of the vehicle. The new Accord is targeted to achieve a "Good" rating, the best rating possible. In the challenging 35 mph NCAP frontal collision, a "Five Star" rating is expected. In side-impact tests, the new Accords are expected to earn a NCAP "Five Star" rating for front and rear occupants when equipped with front-side airbags (side airbags not available on DX sedan, optional on 4-cylinder LX models, standard on all other models). The Accord is joining an exclusive group of cars, such as the Volvo S60 and Lexus IS300 that achieve this very high level of performance. Even when not equipped with side airbags, the Accord is expected to earn a "Four Star" side impact rating.

See the "Interior" Tab for detailed information on the Accord's active safety features.

To make the unibody both stronger and lighter, 48-percent of the 2003 Accord's structure uses "high strength" steel. This material, along with carefully designed load paths within the body structure, helps maintain the integrity of the passenger compartment during a collision.

Front Subframe
In a severe frontal collision, the Accord's new steel subframe (that carries the engine/transmission unit and lower front suspension arms) can move rearward in a controlled manner (an additional 100mm more than the 2002 Accord) to further absorb energy.

Repair Costs
As Honda developed the new Accord Sedan and Coupe it benchmarked midsize competitors like the Toyota Camry, Nissan Altima, Volkswagen Passat and others, not only for passenger crash safety, but also for repair costs associated with low-speed collisions.

One of the most vexing things for a car owner is to have a minor fender-bender and find the repairs cost thousands of dollars. Like all Hondas, the new Accord is engineered to pass the Federal Government pendulum bumper tests at 5 mph, not the 2.5 mph required by the regulation. In addition, based on IIHS test standards, the new Accord is expected to have the lowest repair costs from low-speed impacts of any car in the midsize class. These tests include both flat and angled 5 mph front barrier tests, as well as flat barrier and pole 5 mph rear impact tests.

Aerodynamics Overview
Appearances have an engineering purpose too, in pursuit of the Accord Sedan's 0.30 Cd aerodynamic rating. That's an impressive step forward relative to the previous Sedan's Cd of 0.33. The Accord Coupe has seen similar gains in aerodynamic efficiency, going from 0.32 to a remarkable 0.29. In both body styles, the new shape provides superior stability and even reduces the collection of dirt on portions of the body. And by reducing wind turbulence outside the car, there is less noise inside the car.

There are several examples of how managing airflow helps give the new Accords the lowest wind noise levels of any Honda passenger car ever built. Windshield wipers have been recessed, the wiper arms reshaped and the side mirrors redesigned. Other measures contributing to reduce wind noise levels include dramatically reducing the width of body seams, fairing the A-pillars into the front fenders, mounting glass flush with the surrounding body panels, and using double seals around all doors.

A Pillar Design
The new Accord dramatically smoothes the airflow from the windshield to the side glass by using a three-dimensional side glass shape and a redesigned A-pillar. The result is a reduction in the "peeling vortex" created by the air moving from the windshield to the side glass, which both lowers mid- and high-frequency wind noise and helps improve side glass visibility in rainy conditions.

Side Mirror Design
Honda engineers also studied the airflow through the channel between the mirror and the A-pillar to refine the Accord's side mirrors. By changing the design of the channel to an expanding V-shaped passage, the passing airstream actually decelerates as it moves across the glass. In addition, looking from the side, you can see the mirror has actually been redesigned with more of an airfoil shape. These improvements to the mirror especially help reduce high-frequency wind noise. (See next page for illustration.)

NVH Overview

Front and rear subframes
To maximize gains derived from its stronger body, both the front and rear subframes of the new Accord have structural enhancements that improve ride and handling characteristics, while reducing noise and vibration.

The front subframe is a completely new design with hydroformed elements that substantially increase both strength and rigidity. Hydro-forming is the state-of-the-art method of creating complex shapes from high-strength steel. To make Accord's major subframe components, hydraulic water pressure forces the steel into rigid dies (molds) under tremendous pressure. The result is a precisely made part that is stronger where necessary and precisely the right size and shape. The subframe is attached to the Accord's body using special rubber floating mounts that minimize the amount of both road and engine noise and vibration transferred to the passenger compartment. Like the '02 Accord, the rear subframe of the new Accord uses rubber floating mounts for V6 models, reducing road noise.

Engine Mount System
The Accord has a new hybrid engine mount system, used with both the 4-cylinder and V6 engines. The system combines the strengths of an inertia axis system with those of a center of gravity engine mount system to achieve both excellent NVH and ride and handling.

The system starts by supporting the engine on two large mounts placed below the center of gravity of the powertrain. Combined with the subframe mounts, the engine mounts provide a "double isolation," or double rubber isolating elements between the engine and the passenger compartment, for excellent engine noise attenuation. The front most of these two center of gravity mounts is hydraulic and electronically controlled (except on the 4-cylinder with manual transmission which uses a hydraulic mount). Its hydraulic characteristics switch between two settings - one to optimize vibration performance at idle and one to optimize powertrain damping performance at higher speeds and over rough roads. The rearmost mount is a hydraulic mount for damping of the powertrain over rough roads. A dual mode engine side hydraulic mount is placed high on the engine connecting to the frame rail to best control powertrain motion during handling maneuvers.

An upper transmission mount is added high on the transmission connecting to the frame rail, again to control powertrain motion during handling maneuvers, and serves to provide symmetry in motion control. Finally, two rubber lower transmission mounts complete the setup.

The end result is a system providing excellent noise and vibration attenuation, superior powertrain damping over rough roads, and positive powertrain lateral motion control for excellent handling response. In addition, the mount system was engineered to compliment the subframe "sliding mode" during a front collision event, effectively increasing available crush by 100 mm.

See the "Chassis" Tab for more information on the Accord's suspension revisions.

NVH Insulating Materials
The selection of insulating materials plays a critical part in eliminating interior noise. But the use of thick, heavy insulators can reduce interior space and add weight to a vehicle, reducing performance, handling and fuel economy. For the 2003 Accord, engineers adopted a number of creative solutions, each one custom-designed for a particular area of the car.

Sound reduction strategies:

• Acoustic roof lining between the headliner and the roof sheetmetal is made up of layered materials including fiberglass, an adhesive layer and urethane
• Double door seals reduce intrusion of wind and road noise
• Lightweight melt-sheets used throughout the floor areas and inside the trunk
• Acoustic front fender bulkhead reduces sound made by water, front suspension, tires and road noise
• Formed urethane floor insulator in conjunction with mass-back carpet reduces road noise, vibration and harshness
• Urethane rear-wheel-housing insulator reduces road and water noise
• Hood insulator quiets engine noise

Sophisticated Craftsmanship
Moving the benchmark forward in the midsize segment requires a new level of craftsmanship. Though the Accord already enjoys one of the finest quality reputations and highest residual values (trade-in value) in the segment, the 2003 Sedan and Coupe "up the ante" with further improvements to quality.

Key points:

• Gaps have been reduced between doors and body panels (5.0 =>3.5 mm for the front door to fender, 5.5 => 4.0 mm for front to rear door, and 4.0 => 3.5 mm for the rear door to rear fender)
• "Zero gaps" between bumpers and fender panels
• A near flush center pillar (B-pillar) reduces noise through extraordinary component and assembly tolerances

Door Handles & Latches
Honda engineers studied the door opening and closing feel and sound of top European sedans while working on the new Accord's door pulls and latches. The result is a vehicle that feels like a vastly more expensive European car when you grasp the door pull and open or close the door.

The door pulls on the Sedan are large and suitable for a wide range of hand sizes, even with gloves on in winter. Pulling the handle releases the door with a smooth and quality feeling. The door opens quietly and smoothly. Closing the door produces a soft, quiet and refined quality sound.

Part of the credit for this extraordinary feel goes to the new door sash structures. The stiffer structure better resists the high-frequency vibration that often accompanies door closing, thereby reducing noise. There is also a new door lock mechanism, which drastically reduces lock operation noise. A new door "checker" (or door stop) and a new low-friction center hinge also improve the door function. The result is a firm, smooth, high-quality operation.

Moonroof
Thin and almost invisible, the Accord's available glass moonroof features a new molding that is bonded to the glass. This allows for a virtually flush fit with the surrounding roof, improving appearance and reducing wind noise. The trim around the interior opening has been eliminated for a cleaner appearance. The Coupes sunroof opening has been increased from 246 to 270mm. The Sedan was increased from 328 to 331mm. The motor and drive mechanism is quieter too. Air passes across an open moonroof can create an unpleasant situation called "wind throb" in the car's cabin. A specially designed pop-up deflector in the new Accord moonroof controls wind-flow and results in a 10 dB reduction in "wind throb" noise in city driving at typical speeds.

Multiplex Wiring System
As vehicles gain more and more electronic functions, engineers look for ways to manage the many signals that are required to operate them. Between the keyless entry system, security alarm (on Accord EX), auto-off headlights, TCS (traction control system), optional Navigation system and other features, there are dozens of functions on the new Accords that need to be managed.

In a multiplex system, one wire can carry many commands simultaneously, reducing the size, weight and complexity of wiring harnesses. A uniquely "coded" signal is sent through the wire for each desired function. For instance, a single wire might carry operating commands for all four of the Sedan's power windows and door locks. Each of these functions would be coded separately so that only the desired one would occur when a certain button was pressed-despite the fact that every device on the circuit received the same message.

Multiplexing Theory
Imagine a speaker addressing a room full of people, all of whom have different names. Addressing the entire room, the speaker asks Mike to stand up. Everyone heard the same command, but only Mike obeyed because only his identity "matched" that of the command.

The multiplex wiring system in the 2003 Accord Sedan and Coupe actually consists of two networks and significantly streamlines electrical operations by reducing the size and number of wiring harnesses, lowering vehicle weight, reducing component costs, and improving durability and reliability. The Body Control LAN, or B-CAN uses a communication protocol transmitting data at 33.33 Kbps and is used to control body functions including power windows, relay modules, a "Multiple Integrated Control Unit" or MICU, and turn signal assembly switch. The System control LAN, or F-CAN (Fast-CAN) uses a communication protocol of 500 Kbps and is used to control the engine and transmission ECU including functions like Electronic Throttle Control (ETC) for the V6 engine. These systems use the instrument cluster as a connection point or "gateway". The Accord's multiplex system is designed to be the most technologically sophisticated as well as the lightest and most cost efficient in the midsize category.

Material Technologies
Inside and outside, the 2003 Accord Sedan and Coupe represent a focused effort on Honda's part to reduce vehicle mass, while using high-quality and environmentally friendly materials. The results include better performance, reduced use of natural resources, improved fuel economy and lower emissions. With these gains Honda aimed for the Accord to be best in class on all environmental levels.

Materials such as lead and polyvinyl chloride (PVC) have been dramatically reduced in the new Accord, replaced by thermoplastic resin components such as those used in the fuel tank (non-SULEV variations). Lowering the presence of these materials in the vehicle helps the environment and improves the recyclability of the vehicle's key components at the end of their useful service life.

Trunk Lid Design
The 2003 Accord Coupe has a keyless trunk lock, which allows the trunk to be opened either with the key remote or interior release. The keyless trunk lid improves both security and styling.

2003 Honda Accord - Chassis

In developing the '03 Accord chassis, Honda engineers took on the challenge of providing both world-class dynamic performance and ride comfort. Balancing world-class levels of ride quality, cornering prowess, steering and braking response into one versatile midsize package was no easy task. Establishing the parameters entailed benchmarking an international field of vehicles with the goal of providing a new, more exciting driving experience for Accord owners. Meeting those parameters called for enhancing some areas of the already popular Accord chassis, and a new take on others.

The new Accords retain the basic double-wishbone suspension design that has long made it a favorite. As before, the rear hardware employs an additional multi-link configuration that adds a supplemental lateral link for improved toe control. A totally new front sub-frame, refinements to the front suspension geometry and refinements to the rear sub-frame stiffness and suspension geometry provide a more sophisticated overall character, enhancing body control under acceleration/deceleration, high and low cornering loads and in transient maneuvers. Despite its greatly expanded dynamic envelope, these changes also yield significant improvements in both ride quality and overall isolation.

Accord Chassis Highlights

Improved, Linear Steering

• Rack and pinion power steering system incorporates new orifice type steering damper for improved high speed feel
• New steering kickback reduction valve improves steering feel particularly during cornering
• Improved suspension geometry and body rigidity helps sharpen steering response

Braking

• Larger front disc brake rotor diameters (all 4-cylinder models and V6 Coupe with manual transmission)
• Electronic Brake Distribution (EBD) on all Accord models with 4-wheel disc brakes (EX 4-cylinder, all V6 models)
• ABS is now standard on all Accord models
• A new Traction Control System for V6 models integrates full-range Electronic Throttle Control (ETC) into a system that reduces wheelspin and improves vehicle dynamics at all vehicle speeds
• New lightweight, high-efficiency master cylinder
• New 10-inch brake booster replaces previous 8- and 9-inch tandem setup
• Pedal feel improved-more positive action
• Pedal stroke distance reduced

Ride, Handling and Stability

• All new powertrain mount system provides optimum NVH benefits along with ride and handling enhancements (see NVH section)
• Revised front suspension geometry slightly lowers the roll axis and improves anti dive/squat characteristics
• Stiffened rear sub-frame with revised geometry raises the roll axis and increases anti lift characteristics
• Better roll/pitch control
• Larger wheels and tires on all models
• Larger, high-compliance bushings in front lower control arms reduce impact shocks

Chassis Components

Enhanced Geometry
Improving the new Accord's dynamic capabilities entailed significant revisions to its suspension geometry. These modifications were intended to impart a more sophisticated overall character, enhancing body control under acceleration/deceleration, high and low cornering loads and in transient maneuvers as well as improving stability in cornering.

This comprehensive recalibration process involved changing control arm lengths and locating points on both ends of the car. Up front, this resulted in a lowering of the roll center height and a lengthening of the virtual roll arm length. In the rear, roll center height was raised and the virtual roll arm was lengthened. The rear toe curve also was modified.

Collectively, these changes have transformed the Accord's driving dynamics. With steering response quickened and roll and weight jacking curtailed during spirited cornering, the car feels much more planted and balanced. The revised suspension geometry paid similar dividends in reducing the Accord's pitch tendencies. By increasing the front anti-dive/anti-squat and rear anti-lift angles, these undesirable weight transfer motions were reduced by 25 percent under braking and by 29 percent under acceleration.

Double-Wishbone Front Suspension
A key contributor to the Accord's new ride and handling balance is its front double-wishbone suspension. This latest expression of Honda's suspension technology is an evolution of the system used on the previous Accord. The system is comprised of a large lower arm that pivots from the front subframe, with a smaller upper arm that's positioned above the wheel and tire and wraps around the spring/damper unit to pivot on the mounts in the unibody structure.

The front suspension geometry has been reworked to impart a more sophisticated overall character, enhancing body control under acceleration/deceleration, high and low cornering loads and in transient maneuvers as well as improving stability in cornering.

Five-Link Double-Wishbone Rear Suspension
The Accord's subframe-mounted five-link double wishbone rear suspension is designed to provide precise camber and toe control, exceptional ride compliance and good space efficiency. The system consists of a series of tubular steel links that precisely position the upright that carries each rear wheel through its full suspension motion. The upper and lower links control camber when cornering, so that the tire contact patch remains flat (the optimum position for maximum adhesion) throughout the wheel's range of movement. The lateral links compensate for the inherent toe deviation of independent rear suspensions, which tends to steer the car as it corners (roll steer). As a result, the Accord tracks accurately around curves with no noticeable roll-steer effect.

See the "Body" Tab for more information on the Accord's NVH control features.

High Capacity Front Compliance Bushings
New and substantially larger compliance bushings fitted to the Accord's front lower control arms help improve overall comfort by allowing significantly more fore and aft "give" in the front suspension. On small bumps, pavement seams and patches, the performance of these new bushings is a critical component of overall ride quality and road isolation.

Rack and Pinion Steering With Improved Stability and Reduced Kickback
The Accord's well-weighted and highly responsive power rack-and-pinion steering system provides an exceptionally linear and consistent feel regardless of pavement conditions. The Accord's power assist is steering-torque sensitive; hydraulic boost is applied to the system in direct proportion to the amount of force (torque) created between the tire and the road as the wheel is steered.

As the force increases, the system increases the amount of power assist accordingly. Regardless of speed, an increase in effort is countered by an increase in boost (for example, if the wheels encounter a rough surface with a greater coefficient of friction).

To provide the Accord's steering with a high level of useful feedback without excessive harshness, the system incorporates two new features. The first is a steering damper that smoothes the level of assist provided by the power steering pump, with the benefit of improved steering stability at higher speeds and an improved "feel" throughout all speeds. A kickback reduction valve also has been added to reduce harsh feedback felt through the steering wheel over rough or uneven surfaces, especially during cornering. With conventional steering systems, steering kickback increases in intensity as lateral g-forces and steering torque increase. The Accord's new system substantially reduces the rate of kickback increase.

Upgraded Braking Systems

Stopping power has been enhanced across the Accord lineup. In addition to multiple hardware refinements that enhance stability and help trim braking distances, both the Sedan and Coupe now boast best-in-class pedal feel and stroke. ABS has been made standard equipment on all Accords.

Other key changes include a single, high-efficiency 10-inch booster in place of the 8-inch/9-inch tandem unit used previously; a lighter, more efficient master cylinder; and a new front disc package with increased rotor sizes. On 4-cylinder Accords, the diameter dimension rises from 10.2 to 11.1 inches, equal to that found on automatic transmission V-6 models. That spec jumps from 11.1 to 11.8 inches on the V6 Coupe with 6-speed manual transmission.

Precision optimization of mechanical and hydraulic pressure ratios in the new system yields major improvements to the pedal feel and stroke under both low- and high-effort stopping situations. Brake stroke on the new Accord has been reduced by 11 percent compared to the 2002 model and is now comparable to the best European cars.

ABS
The new Accord's standard ABS system employs four wheel-speed sensors and three control channels. The speed sensor at each wheel sends signals to the ABS control unit, which in turn independently modulates the brake fluid pressure to each front wheel and the rear wheels in tandem. This system enhances the driver's ability to maintain steering control during hard stops on all types of surfaces. The ABS function is particularly effective on split-friction surfaces in which the wheels on one side of the vehicle have significantly less traction than those on the other side.

Electronic Brake Distribution (EBD)
The new EBD system used with 4 wheel disc brakes (EX 4-cylinder and all V6 models) complements the function of the ABS by adjusting braking force front-to-rear depending on passenger (or cargo) positioning to deliver enhanced stability and stopping performance. When brake force is applied, the ABS computer's EBD function estimates the proper distribution of braking pressure based on the difference between the front wheel and rear wheel speeds. Hydraulic pressure to the rear wheel brakes is adjusted via the oil pressure controlling actuator. With a heavy payload under hard braking, the maximum amount of braking force is applied to the rear wheels.

V6 Traction Control System
A new, state-of-the-art traction control system is standard equipment on all V6 Accords. Computer controlled and driver-selectable, this new-generation TCS improves Accords handling, stability and traction at all speeds and with all types of low-grip road conditions. Unlike the previous system that only interfaced with the Accord's ABS circuitry at speeds under 25 mph, this new-generation TCS also incorporates full-range throttle control that prevents undesirable wheel-spin regardless of vehicle velocity and extends active braking control up to 53 mph.

Increased Tire Sizes
To take full advantage of their improved dynamic capabilities, all Accords are now fitted with larger, more performance-oriented all-season tires that enhance ride and handling characteristics. These upgrades appear on both 4-cylinder and V6 models. The most dramatic change is found on the EX V6 Coupe, which is shod with 215/50R17 rubber when fitted with the new 6-speed manual transmission.

2003 Honda Accord - Drivetrain

Two engines are available in the 2003 Accords: a new 2.4-liter 4-cylinder and an extensively revised 3.0-liter V6. Both have more peak power and torque than their predecessors, as well as improved midrange and bottom-end performance. Along with these power gains come lower emissions and improved fuel economy that puts the Accord's engine choices at the head of their respective classes.

Four-cylinder 2003 Accord models come with a new 5-speed manual transmission that's lighter and more compact and has improved shifting feel. Two new 5-speed automatic transmissions have been developed (replacing 4-speed automatics in previous generation Accords), one matched to the 4-cylinder and one for the V6 engine. The manual transmission in the V6 powered "Ultimate Sport Accord Coupe," is a short-throw 6-speed manual transmission.

2.4-liter 4-cylinder highlights

Power

• Displacement increase from 2.3-liters to 2.4-liters
• 160 hp (10 hp/7 percent increase vs. previous 4-cylinder)
• 161 lb.-ft. of torque (9 lb.-ft./6 percent torque increase vs. previous 4-cylinder)
• New i-VTEC system incorporates Variable Valve Timing Electronic Control (VTEC) with continuously variable phasing of the intake camshaft (VTC)
• Internal balance shaft for additional smoothness Improved fuel economy 24/33 mpg (expected EPA City/Hwy estimate from 23/30) with 5AT, 26/34 mpg with 5MT (from 26/32)

Emissions

• New high-efficiency rear facing exhaust manifold/pipe structure reduces the distance to the catalytic converter for more effective operation
• Addition of a Linear Air Fuel ratio sensor to all variations assures air/fuel control (previously SULEV only)
• Increased VTEC swirl ratio
• Internal EGR effect (new i-VTEC technology)

California SULEV version features:

• Mass air flow meter (MAF) for improved A/F control
• Enhanced and larger catalytic converter

NVH

• Rigid block and pan assembly
• Dual balance shafts
• Silent cam chain drive

3.0-liter V6 highlights

Power

• 240 hp (20 percent/40 horsepower increase vs. previous V6)
• 212 lb.-ft. of torque (19 lb.-ft./9 percent torque increase vs. previous V6)
• Compression ratio increases to 10.0:1 from 9.4:1
• 3-rocker VTEC system
• New Electronic Throttle Control (ETC) system
• New high-inertia intake manifold design
• Uses regular unleaded gasoline
• High-flow/low-restriction exhaust system cuts back pressure by 30 percent
• Fuel economy improved from 20/28 to 21/30 mpg (expected EPA estimated City/Hwy with new 5AT)

Emissions

• Significantly reduced emissions (all models meet the new LEV II LEV standards except in California where they meet the new LEV II ULEV standards)
• Close-coupled catalysts for faster light-off
• Addition of a Linear Air Fuel ratio sensor assures precise air/fuel control

NVH

• New engine mounting system also benefits ride and handling
• Rigid engine block

Transmissions

New 5-Speed Automatic Transmission for 4-Cylinder

• Replaces previous 4-speed automatic
• Lightweight, compact design
• Best-in-class performance and shift feel
• New direct electronic control and control-logic circuitry
• High-efficiency, ultra-thin torque converter
• Optimized gear ratios
• Second-generation Active Lockup torque converter contributes to improved fuel economy
• Grade Logic circuitry

New 5-Speed Automatic Transmission for V6

• Replaces previous 4-speed automatic
• Lightweight, compact and high torque design
• Wide ratio range optimizes total performance and fuel economy
• Integration with the new Electronic Throttle Control (ETC) system provides best-in-class shift quality
• Low one-way clutch
• Grade Logic circuitry
• ATF temperature sensor allows temperature compensation for even smoother shifts

New 6-Speed Manual Transmission for V6 Coupe

• Compact, lightweight design
• Precise, short-throw shifting action
• Dual mass flywheel
• Self-adjusting clutch
• Close-ratio gears enhance performance
• Multi cone synchronizers on first through fourth gears
• Synchronizer applied to reverse gear

New 5-Speed Manual Transmission for 4-cylinder

• Lighter and more compact than the previous gearbox
• Smoother, quieter operation
• Lighter shift feel with shorter throws
• Multi-cone synchronizers on first through fourth gears
• Low-effort clutch with short pedal stroke
• Optimized gear ratios

4-Cylinder Engine Overview
Representing the state-of-the-art combination of performance, economy, and ultra-clean operation, the Accord's standard 2.4-liter i-VTEC engine is a showcase of Honda's latest technologies. Building on the solid foundation of the original VTEC design, this latest 16-valve i-VTEC engine transforms the character of the 4-cylinder Accord, providing unprecedented levels of acceleration and fuel efficiency with minimal tailpipe emissions.

This strong running engine equals or betters the old engine's peak torque figure over an impressive 3000-rpm range. Even though it develops significantly more horsepower (+7 percent) and torque (+6 percent), this engine also meets stringent LEV II LEV emission standards. In SULEV spec for the California market, the engine does not compromise power, and requires only the addition of a Mass Air Flow sensor, an enhanced catalytic converter and the use of low sulfur fuel to meet this extremely rigorous emissions standard. This allows this engine to be used in all LX and EX automatic transmission vehicles for California and become a high volume, mainstream engine in the California market for the first time.

Displaying typical Honda attention to engineering detail, this compact and lightweight 4-cylinder engine comes well prepared to serve as the powerplant of choice for roughly 70 percent of Accord buyers. Fitted with internal balance shafts for additional smoothness and cast-in iron cylinder liners to enhance durability, it is designed from the start to deliver years of trouble-free operation. Save for inspections and fluid changes, the first scheduled maintenance comes at the 105,000-mile mark.

Engine Comparison: 2003 Accord Vs. 2002 Accord

Key 4-Cylinder Engine Technologies
The 2.4-liter Accord engine incorporates a host of advanced technologies, highlighted by the adoption of Honda's latest i-VTEC ("intelligent") valve-control system. Developed from technology initially seen in the world of Formula One racing, Honda's original VTEC (Variable valve Timing and lift Electronic Control) system changed the valve lift, timing and duration to suit the engine's running condition.

With continuous phase adjustment of the intake camshaft, i-VTEC adds VTC (Variable Timing Control) to the mix. This latest enhancement, first used on the Acura RSX and also found on the new Honda CR-V and Civic Si engines, provides further improvements to power and torque figures while optimizing overall operating efficiency and minimizing tailpipe emissions. With its greater output, the i-VTEC engine provides the new Accord with better total performance under all types of driving conditions and terrain.

With all-aluminum construction and a 16-valve DOHC design, the new 2.4-liter Accord develops 160 horsepower at 5,500 rpm and 161 lb.-ft. of torque at 4,500 rpm in both LEV and SULEV forms. The combination of VTEC technology with the new VTC provides the engine with even stronger low- and mid-range punch as well as a robust high end. This "intelligent" variation on the basic theme retains the original VTEC hardware that permits the optimization of valve lift and duration as the engine transitions from low-speed to high-speed operation, while adding the ability to continuously vary phasing of the intake cam based on both rpm and load factors. The net result is optimized idle stability, emissions, torque and power.

To further improve its operating efficiency, the engine has been rotated 180 degrees from the previous Accord four. This change permits the catalytic converter to be mounted closer to the exhaust manifold (now on the rear side of the engine), which promotes quicker light-off and thereby helps further reduce cold-start emissions.

Major 4-Cylinder Components

Cylinder Head and Valvetrain
The i-VTEC engine is crowned by a compact, lightweight cylinder head made of pressure-cast aluminum alloy. Its 4-valve-per-cylinder design has double overhead camshafts activated by a silent chain drive to ensure extremely precise control of the cam phasing. The cam drive is maintenance-free throughout the life of the engine. The combustion chamber is designed with a relatively large "squish" area that promotes faster flame propagation on the ignition stroke. This results in more complete burning of the air-fuel mix and subsequently, lower levels of CO and HC emissions.

4-Cylinder i-VTEC
Ushering in a new era of performance technology, Honda's original VTEC (Variable Valve Timing and Lift Electronic Control) has been elevated to a new plateau with the introduction of i-VTEC. This "intelligent" form of the highly effective VTEC package adds a new element to the mix in the form of VTC (Variable Timing Control), which provides for continuously variable phasing of the intake camshaft.

The formidable pairing of VTEC and VTC results in several major improvements to drivability, including more horsepower and torque at lower rpm levels, enhanced fuel economy and significantly lower emissions.

The VTEC system on the new 2.4-liter DOHC four employs two rocker arms with friction-reducing roller followers for each pair of intake valves, along with an intake cam that has separate lobes configured to optimize both low- and high-speed operation. Depending on engine load and rpm, an electronic controller determines which cam profile will be used and exactly how each intake will operate.

At low revs, where low lift and shorter duration provide optimal operation, the timing of the two intakes is staggered and the lift asymmetrically skewed in favor of the primary valve. This helps to create a swirl effect within the combustion chamber that increases the efficiency of the burn process. At higher rpm, a hydraulically actuated spool valve causes a locking pin to engage the secondary rocker arm with the primary one, transitioning the secondary valve into a high-lift/long-duration mode that improves output on the top end.

VTC allows the timing of the intake camshaft to be continuously varied throughout the engine's entire rpm range. Along with helping boost power, VTC also provides a more stable idle (allowing idle speed to be reduced) and reduced pumping losses by effectively creating an internal EGR effect at low and mid engine speeds. The result is increased fuel economy and lowered NOx emissions. Operation of the VTC is electronically controlled and is determined by input from sensors that monitor rpm, timing, throttle opening, cam position and exhaust gases.

Depending on conditions, VTC can vary the phasing of the intake cam (change its position relative to the crankshaft) by +/- 25 degrees. VTC activation is accomplished hydraulically via a spool valve that sends high-pressure oil to passages in the cam's drive sprocket.

At idle, the timing is almost fully retarded to minimize valve overlap. In normal highway driving, the intake camshaft is advanced to provide overlap for EGR effect. With the throttle wide open, valve timing starts in an advanced condition at lower RPM and continuously changes to a retarded condition when redline is approached. This allows optimum cylinder scavenging and pumping efficiency and provides outstanding power and torque throughout the rpm range.

Engine Block, Crankshaft & Oil Pan
The 2.4-liter engine uses a two-piece, die-cast aluminum block and bearing cap design that helps maximize strength and rigidity while minimizing noise and vibration. The compact upper element features cast-in iron cylinder liners for outstanding durability and the lower element consists of a single-casting crankshaft carrier fitted with ferrous-carbon bearing-cap inserts that add to its overall structural rigidity. Each journal on the forged-steel crankshaft is micropolished to help reduce internal friction and improve durability.

Programmed Fuel Injection (PGM-FI)
The 4-cylinder engine is fitted with the latest iteration of Honda's Programmed Fuel Injection (PGM-FI) system. This ultra-precise fuel delivery package uses an array of sensors to constantly monitor a number of critical operating variables including throttle position, intake air temperature, water temperature, ambient air pressure, intake manifold pressure, and the exhaust-air ratios. Position-measuring sensors also are located on the crankshaft and both cams. Fuel is delivered to each cylinder by its own high-efficiency, multi-orifice air assisted injector.

Internal Balance Shafts
To improve smoothness throughout the rev range and help lower noise levels, the new Accord four is fitted with an internal balancer unit. Consisting of a pair of chain-driven counter-rotating shafts located in the oil pan, the balancing system helps quell the inherent second-order harmonic vibrations that normally impact in-line 4-cylinder engines.

Serpentine Drive Belt
The new Accord 4-cylinder uses a single, serpentine belt to operate all of the engine's accessory drives. In addition to saving space compared to the dual-belt system used on the previous four, this maintenance-free component features an integral auto tensioner.

Exhaust System
A high-efficiency exhaust system and a high-density catalytic converter helps the 4-cylinder engine meet stringent LEV II LEV emissions certifications and LEV II-SULEV in California. Both of these components function more effectively as the result of the engine having been rotated 180 degrees in the bay. Exhaust gases pass through a low heat-mass/dual-wall stainless steel manifold as they now exit the "downstream" side of the engine via a new double-walled pipe, that also helps limit heat loss. The combination of higher relative temperatures and a more direct path to the catalytic converter yields quicker light-off, which contributes to lower levels of hydrocarbon and NOx emissions.

Intelligent ECU
The ECU on the new i-VTEC engine is now fitted with an on-board data recorder that constantly monitors operation of both the automatic transmission and fuel-injection circuitry. The system is unique in that it tracks operating parameters before and after a fault occurs, which makes troubleshooting much simpler. The data stream can be downloaded into a diagnostic analyzer at the dealer, where the cause can be identified and proper corrective action taken.

Exhaust System with Compact Silencer
The exhaust system of the new i-VTEC-powered Accord is designed to deliver both functional and cosmetic benefits. Several elements contribute to a reduction in total system weight. These include shortening the engine-to-tailpipe distance (as the result of rotating the engine 180 degrees), eliminating a tailpipe connector flange and adopting a new design for the resonator.

Lighter and more compact than the previously fitted unit, the silencer uses a "pipe turn" internal configuration that helps attenuate exhaust noise levels by 5-7 dB. Its narrower cross section also permits the bumper fascia to be lowered by 25 mm, thereby providing a cleaner appearance to the rear of the car.

Honda's Low Emissions Leadership
Honda has long stood at the forefront of emissions technology. The saga started back in 1974, when the CVCC Civic became the first vehicle to meet smog requirements without a catalytic converter-and on regular gasoline. By 1997, Honda had become the first automaker to voluntarily sell LEV-spec vehicles in all 50 states. That same year, the firm established another clean-air precedent when it launched an Accord that met the even-stricter California ULEV requirements. For the 2000 model year, Honda raised the bar one more time, with its first SULEV Accord model. The arrival of this groundbreaking vehicle attracted national attention, as well as a coveted "Clean Air Award" in the category of Advanced Air Pollution Technology from the California's South Coast Air Quality Management District.

Given that kind of track record, it's hardly surprising to see the launch of a second-generation variant for the 2002CY-even though SULEV requirements won't formally take effect until 2004.

The introduction of i-VTEC technology represents merely the latest step in a commitment to bring low-emissions automotive technology to the mass market as quickly and cost-effectively as possible. It follows on a decision Honda made last year to take a partnership interest in Catalytic Solution, Inc. (CSI) in Oxnard, California, to work on a equally new and revolutionary coating technology for catalytic converters. The CSI/Honda system allows for a dramatic cut in the cost of producing converters by rolling back the amount of precious metals used in the internal coating structures by 50-70 percent. The first of these new-generation catalytic converters is already being fitted on a Honda vehicle being marketed in Japan and the technology will be coming to the U.S. shortly.

SULEV 4-Cylinder Accord Sedan
Honda's revolutionary SULEV-spec 2000 Accord model established a benchmark for ultra-clean emissions technology as the first mass-produced gasoline-powered vehicle to be sold meeting California's stringent Super Ultra Low Emissions Vehicle requirements. For 2003, despite meeting standards requiring 52 percent less CO and 93 percent less NOx than the LEV II LEV Accord 4-cylinder engine, the SULEV engine is rated at the same power and torque as the LEV II LEV engine, showing the inherent clean potential of the new 2.4-liter engine with i-VTEC, especially when operating on low sulfur fuel. Equally impressive, the SULEV Accord is certified to comply with the regulatory emissions levels for a minimum of 15 years or 150,000 miles.

PZEV Evaporative Emissions Technologies
In California's new regulations, when a SULEV engine is used with a "Zero" evaporative emissions system and reduced permeation emissions (fuel emissions that escape through the fuel system components themselves) it can be classified as a PZEV (Partial Zero Emissions Vehicle). The Accord applies the "Zero" evaporative emissions system and reduced permeation emission components to achieve this PZEV status.

Even when parked in the driveway, vehicles are capable of generating a variety of evaporative emissions. Although these hydrocarbon forms come from several sources (tires, paint, upholstery, etc), the principal culprit is the fuel system itself. Honda engineers made several key changes to the new SULEV-spec Accord that address this problem area most effectively. Three specific improvements are the use of lower-permeation materials in all fuel-system related components, employing a more efficient charcoal canister for vapor recovery and the fitting a high-performance purge control device. Collectively, these changes help cut evaporative emissions by up to 83% and permeation emissions by up to 95 percent.

*NMOG = Non Methane Organic Gas

The engine in the SULEV Accord is a modified version of the new the i-VTEC four used in the LEV II-LEV spec models. In addition to the numerous emission-reducing features already incorporated into the basic i-VTEC design, the SULEV configuration adds additional elements that allow it to perform an even higher level of interactive real-time command and control functions. These include a Mass Air Flow sensor (MAF) as well as a slightly larger catalytic converter.

The new SULEV engine is currently teamed only with the new electronically controlled 5-speed automatic transmission. These two major powertrain components directly interface via the main ECU.

An Abridged History of Automotive Emissions Standards

It all started innocently enough when, back in 1961, the state of California mandated that cars registered there be fitted with a rudimentary PCV (Positive Crankcase Ventilation) valve. Since then, the ability to meet ever-tightening emissions legislation has become one of the greatest challenges faced by automakers around the world, particularly on vehicles sold in the Golden State.

By 1970, when the Federal government first began codifying allowable levels of auto emissions under provisions of the Clean Air Act and the new Environmental Protection Agency, California was already ahead of the curve on the matter of curbing tailpipe emissions. It had no other choice. With the largest population of both people and automobiles of any state, it had begun to suffer persistent and worsening air quality problems that could only be rectified by mandating even more stringent values for key pollutants like hydrocarbons (HC), Oxides of Nitrogen (NOx) and Carbon Monoxide (CO). The efforts paid tangible dividends over time, helped by the advent of various smog-fighting tools headed by the 3-way catalytic converter. By 1995, when the vehicle population had more than doubled to 26 million and total miles traveled rose from 112 to 271 million, average per-vehicle HC emissions had been reduced 80 percent and NOx numbers were down by 58 percent.

In 1990, the California Air Resources Board established a new set of standards for vehicle fleets. This system was to be rolled in from 1994 through 2004 and encompassed four main categories, an interim TLEV (Transitional Low Emissions Vehicle), LEV (Low Emissions Vehicle), ULEV (Ultra Low Emissions Vehicles), and ZEV (Zero Emissions Vehicles, which mandate increasingly tougher requirements as indicated in the table below. In 1998, CARB approved its LEV-II standards. Set to take effect in the 2004-2010 time period and requiring light trucks and vans to meet the same strict emissions regulations as passenger cars, it further established the SULEV (Super Ultra Low Emissions Vehicle) rating. The LEV-II program mandates a continuing decrease in fleet average emissions over the 2001-2010 period as well as an additional 75 percent cut in NOx coupled with an extension of emissions systems durability standards from 100,000 to 120,000 miles.

V6 Engine Overview

The Accord's 24-valve V6 engine shares several basic design elements with its predecessor, including a 60-degree/3.0-liter configuration. But a host of technological advances makes it significantly more powerful, more fuel efficient and with lower emissions.

The new V6 engine is nearly 20 pounds lighter and an inch shorter than the V6 it replaces. A 3-rocker VTEC system replaces the two-rocker version used in the previous engine. It develops 20-percent more horsepower and 7-percent more torque-and does so burning regular unleaded gasoline. Despite these major output gains, the new V6 also is expected to boost EPA estimated fuel economy numbers on both the City (21 vs. 20 mpg) and Highway (30 vs. 28mpg) cycles.

For all its sophistication, Honda engineers designed this new V6 to require only minimal care throughout its lifetime by incorporating components like platinum-tipped spark plugs and a new space-saving, self-tensioning serpentine accessory drive belt. Except for periodic inspections and normal fluid replacements, it requires no scheduled maintenance until the 105,000-mile mark. Even oil changes are scheduled for every 10,000 miles.

Key V-6 Engine Technologies
Several key changes to the induction system, exhaust system, and valvetrain combine with a significant increase in the compression ratio to generate major output gains in the Accord's V6. Primary contributors on the intake side include a new high-inertia manifold, a larger and electronically controlled throttle body and even more precise measurement and control capabilities for both air and fuel. These features account for about one third of the additional 40 horsepower the new V6 puts out.

On the downstream side, higher capacity components throughout the entire exhaust system increase the flow rate by 30 percent and are responsible for another third of the overall power increase. The remaining output gains result from improvements in combustion efficiencies derived from larger intake valves, the 3-rocker VTEC system (replacing a two-rocker design), and a bump in compression ratio from 9.4:1 to 10.0:1.

Several factors work together to help the V6-powered Accord achieve improved fuel economy in both EPA City and Highway cycles. A new and more precise electronic knock control system permits the boost in compression ratio. The wider gear ratio range of the new 5-speed automatic transmission boosts operating efficiency and also reduces internal friction. Improved aerodynamics also contributes to improving fuel economy.

Numerous innovative features contribute to the V6 engine's low emissions status, including an advanced fuel injection management system, and unique "unified" exhaust manifold and cylinder head design with close-coupled catalytic converters. This sophisticated system features an ultra-precise linear airflow sensor in addition to a conventional O2 sensor in the secondary under-floor converter. The engine also incorporates an electronic EGR system that helps minimize NOx emissions.

Major V6 components

Cylinder Heads with Integral Exhaust Manifolds
One of the most innovative aspects of the new Accord V6 is the design of its cylinder heads. Made of pressure-cast, low-porosity aluminum, these lightweight components have tuned exhaust manifolds as integral parts of the casting, a unique feature that improves overall packaging and permits optimal positioning of the primary close coupled catalytic converters.

While the new V6 maintains the basic SOHC design, 4-valves-per-cylinder and VTEC, configurations, refinements significantly boost operating efficiencies. As before, each camshaft is inserted into the head from the front of the engine-an approach that saves weight and complexity by eliminating the need for bolt-on cam caps. And the crankshaft still drives each cam via a fiberglass-reinforced toothed timing belt. However, the diameter of the intake valves has been increased to improve breathing and the ports have been reconfigured to more ideally match the flow characteristics of the new, high-inertia intake manifold.

Finally, the VTEC (Variable valve Timing and lift Electronic Control) system has been changed from a 2-rocker to a 3-rocker design for improved throttle response at low rpm and increased ultimate top-end power.

3-Rocker VTEC System
Honda used expertise gained from its successful racing programs to develop the innovative VTEC system more than a decade ago. Since then, various forms of VTEC have become familiar features on many of the company's engines. VTEC makes it possible to vary the relative timing and lift of the intake valves to optimize overall performance, netting good low-end torque as well as improved high-end horsepower.

Basic operation of the 3-rocker VTEC setup used on the 2003 Accord's V6 is similar to that of the 2-rocker version used on the DOHC 4-Cylinder, where rocker arms fitted with low-friction roller followers actuate the intake valves.

The heart of the VTEC system is a unique camshaft and rocker arm system. For each cylinder's set of two intake valves, there are three rocker arms and three corresponding lobes on the camshaft. The two outboard lobes each have a profile maximizing cylinder swirl to suit low- to mid-rpm operation. The third or center cam lobe has a dramatically different profile designed for longer duration and higher lift. This lobe profile is designed to optimize breathing and horsepower production at high engine speeds.

At low engine rpm, the outboard lobes operate the valves. During high-speed operation the VTEC computer sends a signal to a spool valve, which in turn delivers engine oil pressure to small pistons in the rocker arms. Oil pressure causes the pistons to move, locking all three rocker arms together. Once locked, the rocker arms are forced to follow the center cam lobe, increasing top-end performance. The crossover from low lift to high lift occurs in 0.1 seconds and is virtually undetectable to the driver.

Engine Block
At the core of the Accord's lightweight V6 is an exceptionally strong, rigid aluminum-alloy block that employs cast-iron cylinder liners to enhance durability. Die-cast and heat-treated, the block has a high natural resonant frequency and an optimal 60-degree V-angle, features that contribute to the engine's inherently smooth, quiet operation as well as to its relatively compact size. A short deck height also improves its overall packaging efficiency.

Crankshaft, Connecting Rods & Pistons
Internal components of the Accord V6 deliver an outstanding combination of efficiency and durability. The central element is an extremely rigid forged steel crankshaft with microfinished journals that minimize friction and improve durability. Compression ratio of the lightweight cast-aluminum pistons has been increased to 10.0:1, up from 9.4:1 in the previous six.

The precision-contoured piston crowns have a unique charge-centralizing design that maximizes volumetric efficiency and a large squish area that facilitates more complete combustion and leads to decreased emissions. The pistons are fitted with full-floating wrist pins to help eliminate the "slapping" noise that can occur on cold starts.

The crank and pistons are linked by compact connecting rods that employ a special weight-saving, direct-thread fastener in place of the conventional nut-and-bolt configuration typically used on other engines.

Programmed Fuel Injection (PGM-FI)
The new Accord V6 is fitted with the latest iteration of Honda's sophisticated programmed fuel-injection system. It's controlled by a 32-bit microprocessor that uses a comprehensive array of sensors to monitor throttle position, intake manifold pressure, coolant temperature, intake air temperature, atmospheric pressure and the oxygen content of the exhaust gases, as well as the relative positions of the camshafts and crankshaft. Based on the input it receives, the PGM-FI signals an efficient multi-orifice injector for each cylinder to introduce the proper amount of atomized fuel at the precisely timed instant to ensure ideal combustion. Internal feedback circuitry allows the PGM-FI to custom match its real-time operation to accommodate the specific air-fuel conditions that exist in each individual cylinder.

Electronic Throttle Control
Another factor that contributes to the world-class performance of the Accord's new V6 engine is an all-new electronic throttle control (ETC) system. This system controls the throttle during transmission shifts for improved smoothness. It also allows for throttle control to be incorporated in the traction control system and integrates the cruise control function into the ETC. This computer controlled drive-by-wire (DBW) package is a feature that will be incorporated into other future Honda powerplants. Key system components include an accelerator position sensor, electronically controlled throttle body, DBW driver unit, and the main electronic control unit (ECU).

High Inertia Intake Manifold
Air passing through the ETC enters through a new, high-inertia intake manifold with a runner design that's specifically matched to optimize output characteristics. It features a unique plenum configuration that effectively transitions incoming air from a negative to a positive waveform. This helps create a natural supercharging effect and is designed to complement the new intake port design.

Direct Ignition and Knock Control
Ideally balancing performance, economy and low emissions demands precise control of the spark timing as well as an effective ignition system to ensure optimum burning of the air-fuel mixture under all operating conditions. To help accomplish this goal, the a new sensor determines the onset of engine "knocking" and modifies spark timing before this potentially troublesome detonation can do any damage. The system allows the engine to run with a greater amount of spark advance and a higher compression ratio than the previous V6, increasing efficiency. A compact, high-energy ignition coil positioned directly atop each respective plug bore in the cylinder head activates each spark plug in the new engine.

High-flow Exhaust System with Close-Coupled Catalyzers
The high efficiency exhaust system incorporates several key elements that work in concert with the engine's uniquely designed cylinder heads to help boost performance, reduce tailpipe emissions and trim weight. Major system components include two close-coupled primary catalytic converters, a secondary underfloor catalytic converter, a centrally positioned, high-flow resonator and dual rear silencers. Integrating the exhaust manifold into the head casting allowed the primary catalytic converters to be mounted directly to the exhaust orifice. This location ensures an extremely rapid light-off for the high-efficiency 900-cell per square inch converters, which directly contributes to the engine's exceptionally low emissions.

A new high flow hydroformed 2-into-1-collector pipe that transfers exhaust gasses to the secondary 350-cell converter also reduces exhaust backpressure. A new design for the silencer further reduces backpressure. The net result is a 30-percent drop in backpressure compared to the previous Accord V6. These improvements account for 15 of the extra 40 horsepower the new V6 develops. Eliminating a flange on the rear portion of the exhaust pipe and adopting a new, more compact design for the rear silencers also trimmed weight from the system. Because these smaller silencers are easier to package, the rear of the new Accord has a more refined appearance.

Accord V6 with Manual Transmission Sport Sound
The V6 engine in the Accord Coupe fitted with the 6-speed manual transmission features exclusive revisions to the air intake system and a modified single-chamber resonator. This provides the "Ultimate Sport Accord" with a more aggressive intake sound during acceleration, yet retains the sophisticated character of other Accord models under normal cruising conditions.

Accord Transmissions

5-Speed Manual Transmission for 4-Cylinder Engines
The manual transmission paired with the Accord 2.4-liter 4-cylinder engine is a new lightweight, compact 5-speed, housed in a rigid die-cast aluminum case. Multi-cone synchronizers used on first through fourth gears contribute to a smoother, more fluid shift feel, while helping reduce throw distances by 50mm. A repositioned shift lever further facilitates quick, direct gear changes.

The clutch assembly is an equally compact design that features low-torsion springs in the pressure plate to keep pedal effort low and eliminate judder while ensuring a smooth, progressive engagement.

5-Speed Automatic Transmission for 4-Cylinder Engines
The all-new 5-speed automatic transmission replaces the previous 4-speed automatic. It is lightweight and compact and designed to provide best-in-class performance and fuel economy. It also reduces shift shock and improves shift smoothness, thanks to a new linear solenoid with direct control.

The new transmission also features an updated grade logic control system. By using sensors that monitor throttle position, vehicle speed and acceleration/deceleration and then comparing these inputs with a map stored in the transmission's computer, the system is able to determine when the vehicle is on an incline and adjust the shift schedule for improved climbing power or downhill engine braking.

5-Speed Automatic Transmission for V6 Engines
The 5-speed automatic transmission used in V6 Accord models is different from the one in 4-cylinder models, but similar to the one used in new Acura 3.2 TL. This wide ratio transmission's lower gears provide quick acceleration while the tall top gear ratios result in low cruising rpm levels for reduced noise and lower fuel consumption. One difference from the TL transmission is the addition of the ETC system to further enhance shift smoothness by momentarily closing the throttle (reducing torque) at shift points.

Because the transmission shares the idler and third-gear clutches, the transmission provides five ratios in a unit about the size of a conventional 4-speed transmission. The transmission also incorporates a first gear one-way clutch for smoother shifts, plus a heat exchanger that controls and moderates transmission operating temperatures for both durability and improved shifting smoothness.

Linear solenoids provide precise, real-time control of the clutch on/off pressure. This superior clutch-engagement accuracy allows the grade logic control to operate smoothly under all conditions. For added refinement, a bearing supports the idler shaft.

To manage overall powertrain operation, the Powertrain Control Module (PCM) provides precise management of the transmission-engine interaction. For instance, by limiting engine output torque and/or transmission clutch pressure, hard driveline shocks are limited. The system also prevents the engine from exceeding 5000 rpm when the transmission is in neutral or park. It also has an upgraded grade logic control system similar to the one in the transmission for 4-cylinder engines.

6-Speed Manual Transmission For V6 Coupe
To maximize its appeal to enthusiasts, the new V6 Accord Coupe is available with a close-ratio 6-speed manual transmission closely related to the unit in the Acura 3.2CL Type S, creating the "Ultimate Sport Accord". A low (higher numerically) first gear improves acceleration off the line while a tall overdrive sixth gear provides for good fuel economy under freeway cruising conditions.

Prime weight-minimizing elements in this new 6-speed include a high-pressure-cast aluminum alloy casing and a compact gearset made of high-strength steel. Brass multi-cone synchronizers on first through fourth gears, and a single-cone synchro on the reverse gear, help improve shift feel and smoothness while a relatively large gear-mesh contact area decreases internal noise.

The ideally positioned shift lever features short, precise throws and incorporates a positive lockout mechanism that prevents a driver from accidentally shifting into reverse when the car is moving forward. Matching transmission to engine is a new self-adjusting hydraulic clutch that's fitted with a vibration-minimizing dual-mass flywheel.

Honda's Low Emissions Leadership
Honda has long stood at the forefront of emissions technology. The saga started back in 1974, when the CVCC Civic became the first vehicle to meet smog requirements without a catalytic converter-and on regular gasoline. By 1997, Honda had become the first automaker to voluntarily sell LEV-spec vehicles in all 50 states. That same year, the firm established another clean-air precedent when it launched an Accord that met the even-stricter California ULEV requirements. For the 2000 model year, Honda raised the bar one more time, with its first SULEV Accord model. The arrival of this groundbreaking vehicle attracted national attention, as well as a coveted "Clean Air Award" in the category of Advanced Air Pollution Technology from the California's South Coast Air Quality Management District.

Given that kind of track record, it's hardly surprising to see the launch of a second-generation variant for the 2002CY-even though SULEV requirements won't formally take effect until 2004.

The introduction of i-VTEC technology represents merely the latest step in a commitment to bring low-emissions automotive technology to the mass market as quickly and cost-effectively as possible. It follows on a decision Honda made last year to take a partnership interest in Catalytic Solution, Inc. (CSI) in Oxnard, California, to work on a equally new and revolutionary coating technology for catalytic converters. The CSI/Honda system allows for a dramatic cut in the cost of producing converters by rolling back the amount of precious metals used in the internal coating structures by 50-70 percent. The first of these new-generation catalytic converters is already being fitted on a Honda vehicle being marketed in Japan and the technology will be coming to the U.S. shortly.

SULEV 4-Cylinder Accord Sedan
Honda's revolutionary SULEV-spec 2000 Accord model established a benchmark for ultra-clean emissions technology as the first mass-produced gasoline-powered vehicle to be sold meeting California's stringent Super Ultra Low Emissions Vehicle requirements. For 2003, despite meeting standards requiring 52 percent less CO and 93 percent less NOx than the LEV II LEV Accord 4-cylinder engine, the SULEV engine is rated at the same power and torque as the LEV II LEV engine, showing the inherent clean potential of the new 2.4-liter engine with i-VTEC, especially when operating on low sulfur fuel. Equally impressive, the SULEV Accord is certified to comply with the regulatory emissions levels for a minimum of 15 years or 150,000 miles.

PZEV Evaporative Emissions Technologies
In California's new regulations, when a SULEV engine is used with a "Zero" evaporative emissions system and reduced permeation emissions (fuel emissions that escape through the fuel system components themselves) it can be classified as a PZEV (Partial Zero Emissions Vehicle). The Accord applies the "Zero" evaporative emissions system and reduced permeation emission components to achieve this PZEV status.

Even when parked in the driveway, vehicles are capable of generating a variety of evaporative emissions. Although these hydrocarbon forms come from several sources (tires, paint, upholstery, etc), the principal culprit is the fuel system itself. Honda engineers made several key changes to the new SULEV-spec Accord that address this problem area most effectively. Three specific improvements are the use of lower-permeation materials in all fuel-system related components, employing a more efficient charcoal canister for vapor recovery and the fitting a high-performance purge control device. Collectively, these changes help cut evaporative emissions by up to 83% and permeation emissions by up to 95 percent.

*NMOG = Non Methane Organic Gas

The engine in the SULEV Accord is a modified version of the new the i-VTEC four used in the LEV II-LEV spec models. In addition to the numerous emission-reducing features already incorporated into the basic i-VTEC design, the SULEV configuration adds additional elements that allow it to perform an even higher level of interactive real-time command and control functions. These include a Mass Air Flow sensor (MAF) as well as a slightly larger catalytic converter.

The new SULEV engine is currently teamed only with the new electronically controlled 5-speed automatic transmission. These two major powertrain components directly interface via the main ECU.

An Abridged History of Automotive Emissions Standards

It all started innocently enough when, back in 1961, the state of California mandated that cars registered there be fitted with a rudimentary PCV (Positive Crankcase Ventilation) valve. Since then, the ability to meet ever-tightening emissions legislation has become one of the greatest challenges faced by automakers around the world, particularly on vehicles sold in the Golden State.

By 1970, when the Federal government first began codifying allowable levels of auto emissions under provisions of the Clean Air Act and the new Environmental Protection Agency, California was already ahead of the curve on the matter of curbing tailpipe emissions. It had no other choice. With the largest population of both people and automobiles of any state, it had begun to suffer persistent and worsening air quality problems that could only be rectified by mandating even more stringent values for key pollutants like hydrocarbons (HC), Oxides of Nitrogen (NOx) and Carbon Monoxide (CO). The efforts paid tangible dividends over time, helped by the advent of various smog-fighting tools headed by the 3-way catalytic converter. By 1995, when the vehicle population had more than doubled to 26 million and total miles traveled rose from 112 to 271 million, average per-vehicle HC emissions had been reduced 80 percent and NOx numbers were down by 58 percent.

In 1990, the California Air Resources Board established a new set of standards for vehicle fleets. This system was to be rolled in from 1994 through 2004 and encompassed four main categories, an interim TLEV (Transitional Low Emissions Vehicle), LEV (Low Emissions Vehicle), ULEV (Ultra Low Emissions Vehicles), and ZEV (Zero Emissions Vehicles, which mandate increasingly tougher requirements as indicated in the table below. In 1998, CARB approved its LEV-II standards. Set to take effect in the 2004-2010 time period and requiring light trucks and vans to meet the same strict emissions regulations as passenger cars, it further established the SULEV (Super Ultra Low Emissions Vehicle) rating. The LEV-II program mandates a continuing decrease in fleet average emissions over the 2001-2010 period as well as an additional 75 percent cut in NOx coupled with an extension of emissions systems durability standards from 100,000 to 120,000 miles.

V6 Engine Overview

The Accord's 24-valve V6 engine shares several basic design elements with its predecessor, including a 60-degree/3.0-liter configuration. But a host of technological advances makes it significantly more powerful, more fuel efficient and with lower emissions.

The new V6 engine is nearly 20 pounds lighter and an inch shorter than the V6 it replaces. A 3-rocker VTEC system replaces the two-rocker version used in the previous engine. It develops 20-percent more horsepower and 7-percent more torque-and does so burning regular unleaded gasoline. Despite these major output gains, the new V6 also is expected to boost EPA estimated fuel economy numbers on both the City (21 vs. 20 mpg) and Highway (30 vs. 28mpg) cycles.

For all its sophistication, Honda engineers designed this new V6 to require only minimal care throughout its lifetime by incorporating components like platinum-tipped spark plugs and a new space-saving, self-tensioning serpentine accessory drive belt. Except for periodic inspections and normal fluid replacements, it requires no scheduled maintenance until the 105,000-mile mark. Even oil changes are scheduled for every 10,000 miles.

Key V-6 Engine Technologies
Several key changes to the induction system, exhaust system, and valvetrain combine with a significant increase in the compression ratio to generate major output gains in the Accord's V6. Primary contributors on the intake side include a new high-inertia manifold, a larger and electronically controlled throttle body and even more precise measurement and control capabilities for both air and fuel. These features account for about one third of the additional 40 horsepower the new V6 puts out.

On the downstream side, higher capacity components throughout the entire exhaust system increase the flow rate by 30 percent and are responsible for another third of the overall power increase. The remaining output gains result from improvements in combustion efficiencies derived from larger intake valves, the 3-rocker VTEC system (replacing a two-rocker design), and a bump in compression ratio from 9.4:1 to 10.0:1.

Several factors work together to help the V6-powered Accord achieve improved fuel economy in both EPA City and Highway cycles. A new and more precise electronic knock control system permits the boost in compression ratio. The wider gear ratio range of the new 5-speed automatic transmission boosts operating efficiency and also reduces internal friction. Improved aerodynamics also contributes to improving fuel economy.

Numerous innovative features contribute to the V6 engine's low emissions status, including an advanced fuel injection management system, and unique "unified" exhaust manifold and cylinder head design with close-coupled catalytic converters. This sophisticated system features an ultra-precise linear airflow sensor in addition to a conventional O2 sensor in the secondary under-floor converter. The engine also incorporates an electronic EGR system that helps minimize NOx emissions.

Major V6 components

Cylinder Heads with Integral Exhaust Manifolds
One of the most innovative aspects of the new Accord V6 is the design of its cylinder heads. Made of pressure-cast, low-porosity aluminum, these lightweight components have tuned exhaust manifolds as integral parts of the casting, a unique feature that improves overall packaging and permits optimal positioning of the primary close coupled catalytic converters.

While the new V6 maintains the basic SOHC design, 4-valves-per-cylinder and VTEC, configurations, refinements significantly boost operating efficiencies. As before, each camshaft is inserted into the head from the front of the engine-an approach that saves weight and complexity by eliminating the need for bolt-on cam caps. And the crankshaft still drives each cam via a fiberglass-reinforced toothed timing belt. However, the diameter of the intake valves has been increased to improve breathing and the ports have been reconfigured to more ideally match the flow characteristics of the new, high-inertia intake manifold.

Finally, the VTEC (Variable valve Timing and lift Electronic Control) system has been changed from a 2-rocker to a 3-rocker design for improved throttle response at low rpm and increased ultimate top-end power.

3-Rocker VTEC System
Honda used expertise gained from its successful racing programs to develop the innovative VTEC system more than a decade ago. Since then, various forms of VTEC have become familiar features on many of the company's engines. VTEC makes it possible to vary the relative timing and lift of the intake valves to optimize overall performance, netting good low-end torque as well as improved high-end horsepower.

Basic operation of the 3-rocker VTEC setup used on the 2003 Accord's V6 is similar to that of the 2-rocker version used on the DOHC 4-Cylinder, where rocker arms fitted with low-friction roller followers actuate the intake valves.

The heart of the VTEC system is a unique camshaft and rocker arm system. For each cylinder's set of two intake valves, there are three rocker arms and three corresponding lobes on the camshaft. The two outboard lobes each have a profile maximizing cylinder swirl to suit low- to mid-rpm operation. The third or center cam lobe has a dramatically different profile designed for longer duration and higher lift. This lobe profile is designed to optimize breathing and horsepower production at high engine speeds.

At low engine rpm, the outboard lobes operate the valves. During high-speed operation the VTEC computer sends a signal to a spool valve, which in turn delivers engine oil pressure to small pistons in the rocker arms. Oil pressure causes the pistons to move, locking all three rocker arms together. Once locked, the rocker arms are forced to follow the center cam lobe, increasing top-end performance. The crossover from low lift to high lift occurs in 0.1 seconds and is virtually undetectable to the driver.

Engine Block
At the core of the Accord's lightweight V6 is an exceptionally strong, rigid aluminum-alloy block that employs cast-iron cylinder liners to enhance durability. Die-cast and heat-treated, the block has a high natural resonant frequency and an optimal 60-degree V-angle, features that contribute to the engine's inherently smooth, quiet operation as well as to its relatively compact size. A short deck height also improves its overall packaging efficiency.

Crankshaft, Connecting Rods & Pistons
Internal components of the Accord V6 deliver an outstanding combination of efficiency and durability. The central element is an extremely rigid forged steel crankshaft with microfinished journals that minimize friction and improve durability. Compression ratio of the lightweight cast-aluminum pistons has been increased to 10.0:1, up from 9.4:1 in the previous six.

The precision-contoured piston crowns have a unique charge-centralizing design that maximizes volumetric efficiency and a large squish area that facilitates more complete combustion and leads to decreased emissions. The pistons are fitted with full-floating wrist pins to help eliminate the "slapping" noise that can occur on cold starts.

The crank and pistons are linked by compact connecting rods that employ a special weight-saving, direct-thread fastener in place of the conventional nut-and-bolt configuration typically used on other engines.

Programmed Fuel Injection (PGM-FI)
The new Accord V6 is fitted with the latest iteration of Honda's sophisticated programmed fuel-injection system. It's controlled by a 32-bit microprocessor that uses a comprehensive array of sensors to monitor throttle position, intake manifold pressure, coolant temperature, intake air temperature, atmospheric pressure and the oxygen content of the exhaust gases, as well as the relative positions of the camshafts and crankshaft. Based on the input it receives, the PGM-FI signals an efficient multi-orifice injector for each cylinder to introduce the proper amount of atomized fuel at the precisely timed instant to ensure ideal combustion. Internal feedback circuitry allows the PGM-FI to custom match its real-time operation to accommodate the specific air-fuel conditions that exist in each individual cylinder.

Electronic Throttle Control
Another factor that contributes to the world-class performance of the Accord's new V6 engine is an all-new electronic throttle control (ETC) system. This system controls the throttle during transmission shifts for improved smoothness. It also allows for throttle control to be incorporated in the traction control system and integrates the cruise control function into the ETC. This computer controlled drive-by-wire (DBW) package is a feature that will be incorporated into other future Honda powerplants. Key system components include an accelerator position sensor, electronically controlled throttle body, DBW driver unit, and the main electronic control unit (ECU).

High Inertia Intake Manifold
Air passing through the ETC enters through a new, high-inertia intake manifold with a runner design that's specifically matched to optimize output characteristics. It features a unique plenum configuration that effectively transitions incoming air from a negative to a positive waveform. This helps create a natural supercharging effect and is designed to complement the new intake port design.

Direct Ignition and Knock Control
Ideally balancing performance, economy and low emissions demands precise control of the spark timing as well as an effective ignition system to ensure optimum burning of the air-fuel mixture under all operating conditions. To help accomplish this goal, the a new sensor determines the onset of engine "knocking" and modifies spark timing before this potentially troublesome detonation can do any damage. The system allows the engine to run with a greater amount of spark advance and a higher compression ratio than the previous V6, increasing efficiency. A compact, high-energy ignition coil positioned directly atop each respective plug bore in the cylinder head activates each spark plug in the new engine.

High-flow Exhaust System with Close-Coupled Catalyzers
The high efficiency exhaust system incorporates several key elements that work in concert with the engine's uniquely designed cylinder heads to help boost performance, reduce tailpipe emissions and trim weight. Major system components include two close-coupled primary catalytic converters, a secondary underfloor catalytic converter, a centrally positioned, high-flow resonator and dual rear silencers. Integrating the exhaust manifold into the head casting allowed the primary catalytic converters to be mounted directly to the exhaust orifice. This location ensures an extremely rapid light-off for the high-efficiency 900-cell per square inch converters, which directly contributes to the engine's exceptionally low emissions.

A new high flow hydroformed 2-into-1-collector pipe that transfers exhaust gasses to the secondary 350-cell converter also reduces exhaust backpressure. A new design for the silencer further reduces backpressure. The net result is a 30-percent drop in backpressure compared to the previous Accord V6. These improvements account for 15 of the extra 40 horsepower the new V6 develops. Eliminating a flange on the rear portion of the exhaust pipe and adopting a new, more compact design for the rear silencers also trimmed weight from the system. Because these smaller silencers are easier to package, the rear of the new Accord has a more refined appearance.

Accord V6 with Manual Transmission Sport Sound
The V6 engine in the Accord Coupe fitted with the 6-speed manual transmission features exclusive revisions to the air intake system and a modified single-chamber resonator. This provides the "Ultimate Sport Accord" with a more aggressive intake sound during acceleration, yet retains the sophisticated character of other Accord models under normal cruising conditions.

Accord Transmissions

5-Speed Manual Transmission for 4-Cylinder Engines
The manual transmission paired with the Accord 2.4-liter 4-cylinder engine is a new lightweight, compact 5-speed, housed in a rigid die-cast aluminum case. Multi-cone synchronizers used on first through fourth gears contribute to a smoother, more fluid shift feel, while helping reduce throw distances by 50mm. A repositioned shift lever further facilitates quick, direct gear changes.

The clutch assembly is an equally compact design that features low-torsion springs in the pressure plate to keep pedal effort low and eliminate judder while ensuring a smooth, progressive engagement.

5-Speed Automatic Transmission for 4-Cylinder Engines
The all-new 5-speed automatic transmission replaces the previous 4-speed automatic. It is lightweight and compact and designed to provide best-in-class performance and fuel economy. It also reduces shift shock and improves shift smoothness, thanks to a new linear solenoid with direct control.

The new transmission also features an updated grade logic control system. By using sensors that monitor throttle position, vehicle speed and acceleration/deceleration and then comparing these inputs with a map stored in the transmission's computer, the system is able to determine when the vehicle is on an incline and adjust the shift schedule for improved climbing power or downhill engine braking.

5-Speed Automatic Transmission for V6 Engines
The 5-speed automatic transmission used in V6 Accord models is different from the one in 4-cylinder models, but similar to the one used in new Acura 3.2 TL. This wide ratio transmission's lower gears provide quick acceleration while the tall top gear ratios result in low cruising rpm levels for reduced noise and lower fuel consumption. One difference from the TL transmission is the addition of the ETC system to further enhance shift smoothness by momentarily closing the throttle (reducing torque) at shift points.

Because the transmission shares the idler and third-gear clutches, the transmission provides five ratios in a unit about the size of a conventional 4-speed transmission. The transmission also incorporates a first gear one-way clutch for smoother shifts, plus a heat exchanger that controls and moderates transmission operating temperatures for both durability and improved shifting smoothness.

Linear solenoids provide precise, real-time control of the clutch on/off pressure. This superior clutch-engagement accuracy allows the grade logic control to operate smoothly under all conditions. For added refinement, a bearing supports the idler shaft.

To manage overall powertrain operation, the Powertrain Control Module (PCM) provides precise management of the transmission-engine interaction. For instance, by limiting engine output torque and/or transmission clutch pressure, hard driveline shocks are limited. The system also prevents the engine from exceeding 5000 rpm when the transmission is in neutral or park. It also has an upgraded grade logic control system similar to the one in the transmission for 4-cylinder engines.

6-Speed Manual Transmission For V6 Coupe
To maximize its appeal to enthusiasts, the new V6 Accord Coupe is available with a close-ratio 6-speed manual transmission closely related to the unit in the Acura 3.2CL Type S, creating the "Ultimate Sport Accord". A low (higher numerically) first gear improves acceleration off the line while a tall overdrive sixth gear provides for good fuel economy under freeway cruising conditions.

Prime weight-minimizing elements in this new 6-speed include a high-pressure-cast aluminum alloy casing and a compact gearset made of high-strength steel. Brass multi-cone synchronizers on first through fourth gears, and a single-cone synchro on the reverse gear, help improve shift feel and smoothness while a relatively large gear-mesh contact area decreases internal noise.

The ideally positioned shift lever features short, precise throws and incorporates a positive lockout mechanism that prevents a driver from accidentally shifting into reverse when the car is moving forward. Matching transmission to engine is a new self-adjusting hydraulic clutch that's fitted with a vibration-minimizing dual-mass flywheel.

2003 Honda Accord - Interior

For the new generation Accord, Honda designers wanted to bring new levels of style and sophistication to the interior. One key word drove much of the designers' interior work: Emotion. To reach this goal, they sought to blend driver-oriented features with information-oriented technologies and they used many subtle cues to transform the Accord's interior from that of its predecessor.

The proportions and relationships are new, with a higher beltline and more prominent dashboard lending a feeling of substance and solidity. Dramatically more supportive seating and tilt and new telescoping steering provide a fresh driving position aimed at making Accord the fun-to-drive standout in its class. There's also more useful space and more storage throughout the cabin.

The new technology is apparent as soon as you enter the vehicle, embodied in the instrument faces, which are now illuminated by LEDs and present a dark appearance when the car is at rest. Audio systems have been upgraded. EX models now have separate temperature controls for left- and right-side front seat occupants. To open up more storage space, the functions of the audio head unit, climate control unit (HVAC) and even the optional Honda Satellite-Linked Navigation System (NAVI) have been consolidated into a single, easy-to-use display. The NAVI System itself is a new generation voice-activated design, more sophisticated than anything offered by Honda in the past. The latest safety technology also is available, including side airbags and side curtain airbags.

The new Accord interior also exhibits Honda's trademark attention to function and utility and the thoughtful features that have come to separate Hondas from the pack.

What's New Inside the 2003 Accord?

Fun-to-Drive

• Optimized driving position - seat, steering wheel, controls relationship
• More supportive seat construction, padding and bolstering
• LED instrument panel illumination
• Upgraded audio systems
• Available Dealer-Installed DVD and MP3 players

Comfort

• Roomier front interior dimensions
• Tilt and telescoping steering wheel
• More accommodating driving position
• New, larger seat design
• Improved LX manual seat height adjustment mechanism
• Flat floor carpet construction
• Available dual-zone climate control
• Enhanced rear knee room

Utility

• Available new-generation Honda Satellite-Linked Navigation System
• One-touch MAX A/C activation
• Improved front cup holders
• Added bottle holders in front and rear doors
• Sliding center armrest design
• Spring loaded coin holder added to center console tray
• Cell phone charging and storage capability added to center console
• Large covered storage added in the front of the center console
• Remote entry key with additional functions

Quality of Materials

• Improved, upgraded seat materials and stitching
• Interior trim components designed for flush fits, minimum gaps
• Improved fit and finish
• Three different interior dcor combinations
• Improved, more uniform switch feel

Safety

• Dual stage front air bags
• Driver's and front passenger's side airbags (standard on EX 4-cylinder and all V6 models, available on LX 4-cylinder models)
• Out of position (OOP) occupant sensing for passenger seat side airbag
• Side curtain airbag system (EX V6 models)
• Impact absorbing interior padding
• Added rear headrests (rear outboard positions)
• 3-point front seat belts with load-limiters and pre-tensioners
• LATCH child safety seat mounting system

Security

• "Wave" type ignition key
• Engine immobilizer with rolling code
• Added protection for lock mechanisms

Accord Interior Package Concept

Three key factors drove the interior packaging concept for the new Accord:

• Optimal Driving Position

For the driver and front seat passengers, this meant a redoubled effort to refine the Accord's driving position, which included a fresh take on the instrumentation, steering wheel and shifter position, and newly engineered seating.

• Space That Accommodates The Natural Movement of Arms and Legs

For freer movement, the space below the steering wheel and instrument panel was enlarged, and the foot room was increased. In the rear seat area, greater knee clearance was created and the foot area was reworked to provide adequate space regardless of the front seat position.

• Creating space that gives a feeling of security as well as spaciousness

The overall feeling of spaciousness has been enhanced. In combination with optimizing the driving position, close attention was paid to the height of the instrument panel and the beltline at the doors targeting a secure feeling of being "In the car" as opposed to "On the car".

Roomier Interior Dimensions
Like its predecessor, new Accord Sedan will carry an EPA midsize car classification. And even though the interior volume is virtually identical to the old car, the next generation Accord has more useful space in many key areas. Front and rear headroom have been increased, and there is now greater clearance between the head and outer roof rails, even in versions equipped with side curtain air bags. The driver has more knee room, while the front seat passenger has more foot room.

Accommodating Driving Position
The Accord's driving position has been totally revised in pursuit of enhanced comfort and control. During development of the car, a three-continent research project revealed key driving position dimensions that work well for a wide range of drivers. This data was used to develop a new, more adjustable driving position for the Accord, which is more comfortable and adaptable than ever before.

Relative to the previous Accord, the steering wheel has been tilted towards the driver by four degrees, and raised 20 mm. The steering column is now aligned ideally with the driver's body, instead of being slightly offset laterally. In addition, the steering wheel now telescopes 40mm, while retaining its previous tilt feature. By releasing a single steering column-mounted lever, the driver can position the steering wheel as desired.

Calling All Drivers
What constitutes a great driving position? That's a vexing question as different body types and automotive markets make a single "optimum" position hard to home in on. Because the new Accord is a clean sheet design, it provided a perfect opportunity to make the most of fresh research. Honda teams in the U.S., Japan, England and Germany carried out dynamic, on-the-road testing in a wide variety of vehicles, calling on of 85 different drivers of various sizes, sexes and nationalities for input. This driving position survey is the most comprehensive research project on the topic Honda has ever done.

Seating Features and Technology
With a target of surpassing the very best European seats, the Accord design team set out to engineer completely new seating. Besides reducing driver fatigue on long trips, the Accord's new front bucket seats improve the driving posture and better stabilize the body to create a more secure feeling when cornering, accelerating or braking. The new seat has a 40mm taller backrest, and is 43mm wider. The cushion design and material have been redesigned to reduce vibration, and complements a new spring design. New urethane padding material has higher natural damping too.

EX models have a new Shukra-type adjustable lumbar support mechanism that fits the body more comfortably, without the noticeable edges found with some conventional plate-type adjustable lumbar support systems.

The Subjective Science of Sitting
For a seat to function well in a sporting role, stability is critical. Side bolsters are a familiar fixture on sport-oriented seats, but they are only part of the solution to seat stability issues. The seat base is critical too: If it allows too much rocking of the hips, either side-to-side or fore-and-aft, it can make a vehicle feel like a sloppy handler. Conversely, a stable seat base helps provide a sense of precision and control. The Accord team believes the seats in their car now rank with those of the BMW 5-Series and the Mercedes-Benz E-Class in this subtle but important regard.

Improved LX Manual Seat Height Adjustment Mechanism
Front bucket seats in LX models have a new lever-operated, ratchet-type seat height adjustment. Compared to knob-type height adjusters, the new system requires less effort and more precise positioning. The seat's vertical travel has also been increased from 25 mm to 40 mm.

Accord Coupe Interior Packaging
With unique buyers and unique mission, the interior of the Accord Coupe builds on the concepts developed in the four-door Sedan. The instrument binnacle is higher to create a stronger feeling of personal space, while the driving position is lower for a sportier feel.

Accord Coupe Front Bucket Seats
In keeping with the Accord Coupe's more sporting nature, the front seats have a specially modified bolster shape to provide more even more support during cornering. The open front headrests are also unique to the Coupes. To improve access into the rear seats compared to the previous-generation Accord Coupe, the new model has a revised forward tilt mechanism. In the past, the amount of forward tilt of the backrest for passenger entry was determined by the recline setting of the seatback. The new system provides the full amount of forward tilt, regardless of the angle of backrest recline.

Flat Carpet
To improve the sense of craftsmanship of the floor surface, the Accord utilizes a formed urethane insulator to allow the carpet surface to be perfectly flat. Thicker than the cushion in the previous generation Accord, the new molding integrates the front seat mounting rails for a more finished appearance and helps improve sound deadening and the airflow efficiency of the heater.

LED Instrumentation
Supporting the new Accord's driver-oriented nature are large LED instruments that are easy to read and rich in appearance. These types of LED meters have never been used before in a car in this price range, and are typically found in vehicles with MSRP's of $30,000 or more. Standard analog instrumentation includes a large format speedometer, 0-8500 rpm tachometer, and fuel and coolant temperature gauges. EX-L and EX V6 models have an outside temperature indicator as part of the odometer/tripmeter digital display.

Interior Lighting
Enhancements to interior illumination provide added visibility in the EX interior. The console is illuminated at all time by an overhead light that bathes the console in a subtle glow. The power window switches in all four doors are also internally illuminated.

Good To See You
The Accord's new instrument system uses progressive illumination to establish a "dialog" with the driver. When the door is opened, the instrument brightness clicks on at 10 percent - a "welcome" of sorts for the driver. When the key is put in the ignition, the illumination ramps up to 100 percent in one second - warming up for the drive ahead. When the ignition is turned on, the illuminated instrument needles and annunciator lights come on, indicating all systems are go.

After the drive, the process reverses itself. When the ignition is turned off, the instrument lights dim to 10 percent brightness over the course of one second. When the key is taken out of the ignition, the lights dim to zero in one second. The entire process is purposely subtle, but illustrates the level of detailed engineering built into the Accord's interior.

Available Dual-Zone Climate Control
Standard in leather-equipped 4-cylinder EX models and all EX V6 models is a dual-zone climate control system. Easy-to-use rotary temperature knobs are positioned within easy reach of each front seat occupant. The selected temperature for each side appears in the central audio/climate control display (non Navi versions) or in a separate display above the Navi screen.

One-Touch MAX A/C
In Accords with manual climate control systems (all DX and LX versions and four-cylinder EX models without leather seating) a new one-touch "MAX A/C" button makes it easy to cool the interior quickly, without having to manually select "A/C" and recirculate.

Expanded Interior Storage
A new sliding armrest, which adjusts fore and aft to suit different sized drivers and front seat passengers, highlights the expanded list of interior storage choices. Even when extended forward its full 80mm, the armrest still provides enough clearance for the cupholder to accommodate a large-size beverage cup. Inside, the console has coin storage and includes hooks for a cell phone cord to prevent it from being caught when the lid is closed. With the integration of audio, climate controls and optional Honda Navigation System into a single unit, additional storage has been created. Up to 12 CDs can be stored in the lidded compartment immediately below the audio/HVAC/NAVI unit. Even the size of the overhead sunglass holder has been increased.

Integrated Switch Controls
For enhanced styling and functionality, the cruise control switches (LX and EX models) and audio controls (EX models) are now an integral part of the steering wheel design instead of the previous style module attached to the side of the wheel.

Special care was taken to insure that all switches used throughout the Accord cabin have a uniform quality and tactile feel. Switches on the instrument panel and door panels have complimentary force levels and strokes.

Enhanced Remote Entry System Capability
The new keyless entry system offers features more commonly found on more expensive vehicles. Functions formerly relegated to a remote entry key fob have been expanded and are now integrated into the head of the Accord's new high security "wave" ignition key itself. All the windows can be opened remotely, along with the usual door unlocking functions. With a new FM superheterodyne signal, the remote has improved resistance to interference and is more resistant to interference from strong electrical fields such as pager bases or aviation communications.

The new remote is also simple to use. A single push of the "unlock" button unlocks the driver's door. A second push unlocks all the doors. Push the unlock button down again for more than one second continuously, and all the power windows begin to lower, an added feature for '03 that is particularly useful for hot, sunny days. Release the button, and the windows stop. Similar functions can be accomplished with the ignition key inserted in the door lock. Like previous models, turn the key to the unlock position once and the driver's door unlocks.

Return it to the normal position and then back to the unlock position and all the doors unlock. In addition for '03, hold the key in the unlock position for more than one second and the windows start to open, until you return the key to the normal position.

The key can also close the windows while in the driver's door lock. A single turn to the locked position will again lock all the doors. For '03, a return to the normal position followed by a turn to the lock position closes the windows. Any time the key is returned to the normal position, the windows stop.

Interior Demonstrates Improved Fit And Finish
Many small touches help to raise the Accord's interior ambience to a new level. Gaps and overlapping trim have been reduced or in some cases eliminated entirely. Small things like hidden screws in the sun visor stays, flush-mounted interior light, spring-loaded self stowing grab handles and a flat trunk floor all illustrate the Accord's heightened attention to detail.

Cargo Utility
Both the Accord Sedan and Coupe have about the same the same trunk space as the models they replace. Close attention to the shape of the trunk and its access allow both cars to handle the same size and quantity of cargo items as their predecessors. A lower lift-over design for the Coupe eases loading and unloading.

Trim & Color Combinations
EX models are available with three different interior trim color combinations. Cars with black or gray interiors have brushed aluminum look accents on the center console and door armrests. Cars with light ivory interiors have wood grain style accents inspired by light Mapa Burl veneer.

Accord Entertainment/Navigation Systems

Upgraded Audio Systems
The Accord features three different audio systems to suit differing buyers and price points. DX and LX models have AM/FM/CD head units with 120 watts of power. DX model have two speakers while LX models have six speakers. Compared to the previous Accord, the front speakers are upgraded with Neodymium speaker magnets and polypropylene cones, and the tweeters have been improved for frequency response.

Five-point parametric equalization helps tune each system's frequency response to the unique acoustic properties of the Accord's interior to deliver fuller, more accurate sound quality. Relative to the previous generation Accord, the new system advances sound quality on all fronts, most notably in the high and mid frequencies.

EX models adds an in-dash 6 CD changer to the AM/FM system in place of the single CD unit, along with Neodymium magnet/polypropylene cone 6 x 9 inch rear speakers for reduced distortion with superior accuracy and increased bass power and clarity.

For the ultimate in sound performance, the Accord V6 Coupe with 6-speed manual transmission is equipped with a special Premium Audio System as standard. This system starts with the AM/FM/6-disc, in-dash CD changer, then adds an accurate MOSFET amplifier that kicks out 180 watts of power. Twin-Neodymium speakers with polypropylene cone woofers and soft dome tweeters are used up front, with twin 6 x 9 Twin-Neodymium polypropylene cones are in back.

All the Accord systems feature 2-band compression that improves the sound quality at low volume settings. Since some audio system frequencies are masked by vehicle noise, this digital sound compression boosts select frequencies and reduces others. The result is clearer, more balanced audio at low listening levels.

Interior Accessories
A variety of factory engineered accessories are available for the '03 Accord. A MP3/Windows Media Player can be installed in place of the standard storage bin beneath the audio/HVAC unit. A DVD Rear Entertainment System can also be installed. The DVD player for this system mounts below the standard audio system and the audio plays over the Accord's standard sound system or through a set of cordless IR headphones. The 7-inch (diagonal) TFT screen is mounted to the headliner, just behind the front seats, for use by rear seat passengers. A cordless remote control lets back seat passengers control program material. A hands-free cellular telephone system is also offered as an accessory.

"Touch by Voice" Honda Satellite-Linked DVD Navigation SystemThe "Touch by Voice" Honda Navigation Systems, a new generation of Honda navigation systems, debuts on the 2003 Accord with new features and greatly enhanced capabilities. New features include a newly-developed voice recognition system, a larger touch screen display, and an expanded database that covers virtually all U.S. roads and 7 million points of interest (compared to one million for most systems currently on the market).

Honda navigation systems have long been recognized for their simple, intuitive operation and extensive on-board database. Now available on 4-cylinder EX models equipped with leather and on all V6 EX models, this is the first time the Honda Navigation System has been offered on any Accord.

A new split screen design enhances on-screen information with a "map view" and "3-D" route visualization of freeways simultaneously-a major step forward in making navigation information easier to understand. The system is integrated into the car's audio system, so driving instructions can be heard over the speaker system, and the voice recognition feature adds a new realm of control to the navigation system.

The Accord's Honda Satellite-Linked DVD Navigation System uses Global Positioning Satellites (GPS) in combination with detailed information from the vehicle's DVD-based mapping system to pinpoint the vehicle's location and to provide a host of useful mapping and route guidance features. The antenna can utilize up to 12 satellites from a network of 24 global positioning satellites. If the antenna is obstructed by a tunnel, a parking garage or a tall building, an internal gyroscopic system and a speed sensor track the location of the vehicle so that the map information remains current and reliable.

Honda Satellite-Linked DVD Navigation System Features Summary
New features and significant advancements include (when compared to the 2002 Honda Odyssey's navigation system):

• 7-inch screen (1-inch larger);
• Faster route calculation and search speed (up to 3 times faster);
• Touch by Voice human voice recognition system minimizes need for keyboard entry (new feature);
• A more comprehensive destination guide with seven million points of interest (previously 3.7 million). As before, it provides a business and recreation directory of virtually the entire continental United States complete with local addresses and business phone numbers. Categories include restaurants (searchable by type of cuisine), lodging, shopping, airports, hospitals, recreation areas and much more;
• 3-D turn-by-turn graphics for freeways (previously 2-D);
• Enhanced split screen mode for additional route information (new feature);
• Touch by Voice linked to audio and HVAC systems (new feature);
• Day/Night visualization modes with user-selectable screen appearance; and
• Enhanced menus and improved surface street mapping (new layout).

Additional general features include:

• Turn by turn voice guidance in either male or female voice (and can be turned off at any time);
• Destination memory recalls current trip addresses and previous destinations; and
• Trip Computer, calendar and calculator with English to metric number converter.

Voice Recognition and Navigation System Controls
The navigation system can be controlled by the driver through either the voice recognition system called Touch by Voice, the touch screen display, or by the joystick on the instrument panel. The voice recognition system works when the "talk" button, located on the steering wheel, is depressed. When spoken to, the system recognizes commands such as "find nearest gas station," "find nearest ATM," or "find nearest Italian restaurant."

The Touch by Voice system is powered by IBM's Embedded Via Voice technology and uses software developed jointly by IBM and Honda R&D. It has a vocabulary of approximately 150 commands and can recognize virtually any English-spoken accent.

The 7-inch LCD display is a touch screen that allows the driver or passenger to choose menu options or spell out a word (i.e. address, business name, place, etc.) through a touch-sensitive keypad. (The keypad can be set to alphabetical or a common typewriter style layout.) Alternatively, the joystick can be used to highlight menu options or to highlight specific letters on the keypad to complete a word. A matte finish is used on the display to reduce glare and smudging.

For data storage, the system uses a single DVD that contains information for the entire United States. Navigation systems from some manufacturers require multiple CDs (CDs hold much less data than a DVD) and must be changed depending on the region of the country. Future updates to the navigation system can be made by installing an updated DVD (available on-line or by calling a toll free number.)

Interior Safety Feature Overview
The new generation Accord has the most comprehensive array of safety features ever assembled in a Honda vehicle. In addition to the technologies built into the Accord's unibody to attenuate crash energy and protect the car's occupants, (See the "Body" Tab), the interior features top-of-the-class safety measures.

The Accord has three-point seat belts at all five seating positions. The front seatbelts are equipped with load-limiters and pre-tensioners. Rear seats are equipped with a child seat restraint LATCH (Lower Anchors and Tethers for Children) system. New front seat headrest positioning enhances performance in low-speed rear-end collisions.

Outboard rear headrests are standard on all models. Key areas of the interior are also equipped with impact absorption pads to reduce impact severity to the vehicle's occupants.

See the "Body" Tab for detailed information on the Accord's structural safety features.

For frontal impact protection, both the driver and front seat passenger have dual-stage Supplemental Restraint System (SRS) airbags. Driver's and front passenger's side airbags are now standard on EX 4-cylinder models and all V6 models, and available on LX 4-cylinder models.

Front Seat Side Airbags with Passenger-Side Position Sensor
The Accord's front passenger seat is equipped with an innovative system designed to prevent injury to a small child or small-statured adult by preventing side air bag deployment if they lean into the side air bag deployment path. Seven sensors in the passenger seatback determine the height and position of the occupant to assist the system in determining if it is safe to deploy the side air bag.

If the passenger is in the deployment path of the side air bag, the system will prevent the side air bag from inflating. When the passenger returns to an upright seating position, the side air bag will reactivate so it can deploy and protect the passenger in a side impact.

Available Side Curtain Airbag System
EX models with the V6 engine come standard with side curtain airbags that cover the front and rear side windows on both sides of the vehicle in the event of a side-impact crash. The system reduces the impact of the secondary crash between the passenger's head and objects outside the vehicle caused by the primary impact. Working in concert with the Accord's standard front airbags and front seat side-impact airbags, the side curtain airbag system offers a new level of protection.

The side curtain airbag module is positioned in a small compartment along the side of the roofline. For the sedan, each side of the vehicle has two sensors mounted near the side sill that trigger the side curtain air bag. Due to structural differences, only one sensor per side is required for the coupe with side curtain air bag.

When a sensor detects an impact from the side, a gas generator installed at the rear pillar inflates the bag fully in about 20 milliseconds to create a cushioning layer for the driver and passenger. A new type of inflator is responsible for this exceptionally quick deployment time. Compared to conventional airbags, the Accord system also uses a lower internal bag pressure and a longer bag stroke to reduce the g load on occupants in a side collision. To accommodate the operation of the roof side airbags, cars so equipped come with sliding-type sun visors that track inward in the event of a side collision.

Containment Is Key
Side impacts are a challenge for safety engineers. Large areas of glass can't provide reliable passenger containment, and offer only limited energy absorption properties. Keeping the passengers (and their head and arms) in the vehicle and cushioning their impact with objects outside the vehicle is the purpose behind the Accord's available side curtain airbag system. By shrouding the side window area of the car, the Accord's side curtain airbag system offers one of the largest protection areas currently available among inflatable restraints. Additionally, the protection extends fully into the rear seat area, unlike tube-type bags or front seat head and chest integrated bags.

Anti-Theft Features
The new Accord is protected by a variety of anti-theft features. All models now feature the "wave" key for door, ignition and trunk locks. This type of lock is much more resistant to "picking" than conventional designs. Door and hood locks and their operating cables are now more thoroughly protected to prevent a "Slim Jim" or other jimmying device from being used to force entry. The engine immobilizer system used on previous generation Accords to shut down the engine's electronic control unit (ECU) has been further enhanced with the addition of a rolling code.

Good To See You
The Accord's new instrument system uses progressive illumination to establish a "dialog" with the driver. When the door is opened, the instrument brightness clicks on at 10 percent - a "welcome" of sorts for the driver. When the key is put in the ignition, the illumination ramps up to 100 percent in one second - warming up for the drive ahead. When the ignition is turned on, the illuminated instrument needles and annunciator lights come on, indicating all systems are go.

After the drive, the process reverses itself. When the ignition is turned off, the instrument lights dim to 10 percent brightness over the course of one second. When the key is taken out of the ignition, the lights dim to zero in one second. The entire process is purposely subtle, but illustrates the level of detailed engineering built into the Accord's interior.

Available Dual-Zone Climate Control
Standard in leather-equipped 4-cylinder EX models and all EX V6 models is a dual-zone climate control system. Easy-to-use rotary temperature knobs are positioned within easy reach of each front seat occupant. The selected temperature for each side appears in the central audio/climate control display (non Navi versions) or in a separate display above the Navi screen.

One-Touch MAX A/C
In Accords with manual climate control systems (all DX and LX versions and four-cylinder EX models without leather seating) a new one-touch "MAX A/C" button makes it easy to cool the interior quickly, without having to manually select "A/C" and recirculate.

Expanded Interior Storage
A new sliding armrest, which adjusts fore and aft to suit different sized drivers and front seat passengers, highlights the expanded list of interior storage choices. Even when extended forward its full 80mm, the armrest still provides enough clearance for the cupholder to accommodate a large-size beverage cup. Inside, the console has coin storage and includes hooks for a cell phone cord to prevent it from being caught when the lid is closed. With the integration of audio, climate controls and optional Honda Navigation System into a single unit, additional storage has been created. Up to 12 CDs can be stored in the lidded compartment immediately below the audio/HVAC/NAVI unit. Even the size of the overhead sunglass holder has been increased.

Integrated Switch Controls
For enhanced styling and functionality, the cruise control switches (LX and EX models) and audio controls (EX models) are now an integral part of the steering wheel design instead of the previous style module attached to the side of the wheel.

Special care was taken to insure that all switches used throughout the Accord cabin have a uniform quality and tactile feel. Switches on the instrument panel and door panels have complimentary force levels and strokes.

Enhanced Remote Entry System Capability
The new keyless entry system offers features more commonly found on more expensive vehicles. Functions formerly relegated to a remote entry key fob have been expanded and are now integrated into the head of the Accord's new high security "wave" ignition key itself. All the windows can be opened remotely, along with the usual door unlocking functions. With a new FM superheterodyne signal, the remote has improved resistance to interference and is more resistant to interference from strong electrical fields such as pager bases or aviation communications.

The new remote is also simple to use. A single push of the "unlock" button unlocks the driver's door. A second push unlocks all the doors. Push the unlock button down again for more than one second continuously, and all the power windows begin to lower, an added feature for '03 that is particularly useful for hot, sunny days. Release the button, and the windows stop. Similar functions can be accomplished with the ignition key inserted in the door lock. Like previous models, turn the key to the unlock position once and the driver's door unlocks.

Return it to the normal position and then back to the unlock position and all the doors unlock. In addition for '03, hold the key in the unlock position for more than one second and the windows start to open, until you return the key to the normal position.

The key can also close the windows while in the driver's door lock. A single turn to the locked position will again lock all the doors. For '03, a return to the normal position followed by a turn to the lock position closes the windows. Any time the key is returned to the normal position, the windows stop.

Interior Demonstrates Improved Fit And Finish
Many small touches help to raise the Accord's interior ambience to a new level. Gaps and overlapping trim have been reduced or in some cases eliminated entirely. Small things like hidden screws in the sun visor stays, flush-mounted interior light, spring-loaded self stowing grab handles and a flat trunk floor all illustrate the Accord's heightened attention to detail.

Cargo Utility
Both the Accord Sedan and Coupe have about the same the same trunk space as the models they replace. Close attention to the shape of the trunk and its access allow both cars to handle the same size and quantity of cargo items as their predecessors. A lower lift-over design for the Coupe eases loading and unloading.

Trim & Color Combinations
EX models are available with three different interior trim color combinations. Cars with black or gray interiors have brushed aluminum look accents on the center console and door armrests. Cars with light ivory interiors have wood grain style accents inspired by light Mapa Burl veneer.

Accord Entertainment/Navigation Systems

Upgraded Audio Systems
The Accord features three different audio systems to suit differing buyers and price points. DX and LX models have AM/FM/CD head units with 120 watts of power. DX model have two speakers while LX models have six speakers. Compared to the previous Accord, the front speakers are upgraded with Neodymium speaker magnets and polypropylene cones, and the tweeters have been improved for frequency response.

Five-point parametric equalization helps tune each system's frequency response to the unique acoustic properties of the Accord's interior to deliver fuller, more accurate sound quality. Relative to the previous generation Accord, the new system advances sound quality on all fronts, most notably in the high and mid frequencies.

EX models adds an in-dash 6 CD changer to the AM/FM system in place of the single CD unit, along with Neodymium magnet/polypropylene cone 6 x 9 inch rear speakers for reduced distortion with superior accuracy and increased bass power and clarity.

For the ultimate in sound performance, the Accord V6 Coupe with 6-speed manual transmission is equipped with a special Premium Audio System as standard. This system starts with the AM/FM/6-disc, in-dash CD changer, then adds an accurate MOSFET amplifier that kicks out 180 watts of power. Twin-Neodymium speakers with polypropylene cone woofers and soft dome tweeters are used up front, with twin 6 x 9 Twin-Neodymium polypropylene cones are in back.

All the Accord systems feature 2-band compression that improves the sound quality at low volume settings. Since some audio system frequencies are masked by vehicle noise, this digital sound compression boosts select frequencies and reduces others. The result is clearer, more balanced audio at low listening levels.

Interior Accessories
A variety of factory engineered accessories are available for the '03 Accord. A MP3/Windows Media Player can be installed in place of the standard storage bin beneath the audio/HVAC unit. A DVD Rear Entertainment System can also be installed. The DVD player for this system mounts below the standard audio system and the audio plays over the Accord's standard sound system or through a set of cordless IR headphones. The 7-inch (diagonal) TFT screen is mounted to the headliner, just behind the front seats, for use by rear seat passengers. A cordless remote control lets back seat passengers control program material. A hands-free cellular telephone system is also offered as an accessory.

"Touch by Voice" Honda Satellite-Linked DVD Navigation SystemThe "Touch by Voice" Honda Navigation Systems, a new generation of Honda navigation systems, debuts on the 2003 Accord with new features and greatly enhanced capabilities. New features include a newly-developed voice recognition system, a larger touch screen display, and an expanded database that covers virtually all U.S. roads and 7 million points of interest (compared to one million for most systems currently on the market).

Honda navigation systems have long been recognized for their simple, intuitive operation and extensive on-board database. Now available on 4-cylinder EX models equipped with leather and on all V6 EX models, this is the first time the Honda Navigation System has been offered on any Accord.

A new split screen design enhances on-screen information with a "map view" and "3-D" route visualization of freeways simultaneously-a major step forward in making navigation information easier to understand. The system is integrated into the car's audio system, so driving instructions can be heard over the speaker system, and the voice recognition feature adds a new realm of control to the navigation system.

The Accord's Honda Satellite-Linked DVD Navigation System uses Global Positioning Satellites (GPS) in combination with detailed information from the vehicle's DVD-based mapping system to pinpoint the vehicle's location and to provide a host of useful mapping and route guidance features. The antenna can utilize up to 12 satellites from a network of 24 global positioning satellites. If the antenna is obstructed by a tunnel, a parking garage or a tall building, an internal gyroscopic system and a speed sensor track the location of the vehicle so that the map information remains current and reliable.

Honda Satellite-Linked DVD Navigation System Features Summary
New features and significant advancements include (when compared to the 2002 Honda Odyssey's navigation system):

• 7-inch screen (1-inch larger);
• Faster route calculation and search speed (up to 3 times faster);
• Touch by Voice human voice recognition system minimizes need for keyboard entry (new feature);
• A more comprehensive destination guide with seven million points of interest (previously 3.7 million). As before, it provides a business and recreation directory of virtually the entire continental United States complete with local addresses and business phone numbers. Categories include restaurants (searchable by type of cuisine), lodging, shopping, airports, hospitals, recreation areas and much more;
• 3-D turn-by-turn graphics for freeways (previously 2-D);
• Enhanced split screen mode for additional route information (new feature);
• Touch by Voice linked to audio and HVAC systems (new feature);
• Day/Night visualization modes with user-selectable screen appearance; and
• Enhanced menus and improved surface street mapping (new layout).

Additional general features include:

• Turn by turn voice guidance in either male or female voice (and can be turned off at any time);
• Destination memory recalls current trip addresses and previous destinations; and
• Trip Computer, calendar and calculator with English to metric number converter.

Voice Recognition and Navigation System Controls
The navigation system can be controlled by the driver through either the voice recognition system called Touch by Voice, the touch screen display, or by the joystick on the instrument panel. The voice recognition system works when the "talk" button, located on the steering wheel, is depressed. When spoken to, the system recognizes commands such as "find nearest gas station," "find nearest ATM," or "find nearest Italian restaurant."

The Touch by Voice system is powered by IBM's Embedded Via Voice technology and uses software developed jointly by IBM and Honda R&D. It has a vocabulary of approximately 150 commands and can recognize virtually any English-spoken accent.

The 7-inch LCD display is a touch screen that allows the driver or passenger to choose menu options or spell out a word (i.e. address, business name, place, etc.) through a touch-sensitive keypad. (The keypad can be set to alphabetical or a common typewriter style layout.) Alternatively, the joystick can be used to highlight menu options or to highlight specific letters on the keypad to complete a word. A matte finish is used on the display to reduce glare and smudging.

For data storage, the system uses a single DVD that contains information for the entire United States. Navigation systems from some manufacturers require multiple CDs (CDs hold much less data than a DVD) and must be changed depending on the region of the country. Future updates to the navigation system can be made by installing an updated DVD (available on-line or by calling a toll free number.)

Interior Safety Feature Overview
The new generation Accord has the most comprehensive array of safety features ever assembled in a Honda vehicle. In addition to the technologies built into the Accord's unibody to attenuate crash energy and protect the car's occupants, (See the "Body" Tab), the interior features top-of-the-class safety measures.

The Accord has three-point seat belts at all five seating positions. The front seatbelts are equipped with load-limiters and pre-tensioners. Rear seats are equipped with a child seat restraint LATCH (Lower Anchors and Tethers for Children) system. New front seat headrest positioning enhances performance in low-speed rear-end collisions.

Outboard rear headrests are standard on all models. Key areas of the interior are also equipped with impact absorption pads to reduce impact severity to the vehicle's occupants.

See the "Body" Tab for detailed information on the Accord's structural safety features.

For frontal impact protection, both the driver and front seat passenger have dual-stage Supplemental Restraint System (SRS) airbags. Driver's and front passenger's side airbags are now standard on EX 4-cylinder models and all V6 models, and available on LX 4-cylinder models.

Front Seat Side Airbags with Passenger-Side Position Sensor
The Accord's front passenger seat is equipped with an innovative system designed to prevent injury to a small child or small-statured adult by preventing side air bag deployment if they lean into the side air bag deployment path. Seven sensors in the passenger seatback determine the height and position of the occupant to assist the system in determining if it is safe to deploy the side air bag.

If the passenger is in the deployment path of the side air bag, the system will prevent the side air bag from inflating. When the passenger returns to an upright seating position, the side air bag will reactivate so it can deploy and protect the passenger in a side impact.

Available Side Curtain Airbag System
EX models with the V6 engine come standard with side curtain airbags that cover the front and rear side windows on both sides of the vehicle in the event of a side-impact crash. The system reduces the impact of the secondary crash between the passenger's head and objects outside the vehicle caused by the primary impact. Working in concert with the Accord's standard front airbags and front seat side-impact airbags, the side curtain airbag system offers a new level of protection.

The side curtain airbag module is positioned in a small compartment along the side of the roofline. For the sedan, each side of the vehicle has two sensors mounted near the side sill that trigger the side curtain air bag. Due to structural differences, only one sensor per side is required for the coupe with side curtain air bag.

When a sensor detects an impact from the side, a gas generator installed at the rear pillar inflates the bag fully in about 20 milliseconds to create a cushioning layer for the driver and passenger. A new type of inflator is responsible for this exceptionally quick deployment time. Compared to conventional airbags, the Accord system also uses a lower internal bag pressure and a longer bag stroke to reduce the g load on occupants in a side collision. To accommodate the operation of the roof side airbags, cars so equipped come with sliding-type sun visors that track inward in the event of a side collision.

Containment Is Key
Side impacts are a challenge for safety engineers. Large areas of glass can't provide reliable passenger containment, and offer only limited energy absorption properties. Keeping the passengers (and their head and arms) in the vehicle and cushioning their impact with objects outside the vehicle is the purpose behind the Accord's available side curtain airbag system. By shrouding the side window area of the car, the Accord's side curtain airbag system offers one of the largest protection areas currently available among inflatable restraints. Additionally, the protection extends fully into the rear seat area, unlike tube-type bags or front seat head and chest integrated bags.

Anti-Theft Features
The new Accord is protected by a variety of anti-theft features. All models now feature the "wave" key for door, ignition and trunk locks. This type of lock is much more resistant to "picking" than conventional designs. Door and hood locks and their operating cables are now more thoroughly protected to prevent a "Slim Jim" or other jimmying device from being used to force entry. The engine immobilizer system used on previous generation Accords to shut down the engine's electronic control unit (ECU) has been further enhanced with the addition of a rolling code.